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POPcon and POPcon PRO frequently asked questions:

How can I transfer my POPcon configuration settings to my new server without retyping it all?

You can do this using the registry editor since POPcon's configuration information is stored in the registry:

Export the key KEY_LOCAL_MACHINE/Software/POPcon and /POPcon PRO as well as their subkeys into a .reg file using the EXPORT function of the REGEDIT application.

Then copy the .reg file to the target machine. Make sure the POPcon service is not already running (or if it is stop it using the control panel / services applet). Then double-click on the .reg file on the target machine to automatically add all the entries to the registry. Restart the POPcon service and check the configuration using POPconAdmin.

New for Exchange 2007 and/or installations on 64bit Windows: In 64bit Windows installations the configuration is stored under HKEY_LOCAL_MACHINE/Software/Wow6432Node/POPcon instead KEY_LOCAL_MACHINE/Software/POPcon. If you want to transfer the configuration from a 32bit installation to a 64bit installation you need to modify the .reg file with a text editor and replace the /Software/POPcon strings throughout that file with /Software/Wow6432Node/POPcon before importing the file on the 64bit machine.

As a last step please open the configuration with POPconAdmin and check that everything is imported correctly. Then go to the ADVANCED configruation page and switch the local IP address to be used for connections both to Exchange and the POP3 servers to "Default" in case they are still configured to be the IP addresses of the old server. This setting can be found at the bottom of the ADVANCED configuration page



My Exchange 2007 does not accept emails from POPcon and answers "530 5.7.1 Client was not authenticated"!

The problem is caused by the default authentication settings of the Exchange (2007 and 2010) SMTP receive connector. By default the receive connector only allows authenticated transfers. But since POPcon simulates incomming email from remote servers it can not authenticate itself to Exchange.

You can change the authentication settings with the Exchange Management Console: To find receive connectors in the Exchange Management Console, navigate to Server Configuration -> Hub Transport. Then select your server and you'll see the Receive Connectors tab below. The "Default" receive connector on Hub is configured for other Exchange servers to authenticate, but it does not accept anonymous email by default as it needs to accept actual SMTP emails from outside/POPcon.

Usually the "Default" receive connector is the one active for SMTP connections on the same server (that is where POPcon sends from). If you use Windows Small Business Server (SBS) then there could also be a "Fax sharepoint" receive connector that can also be the active connector for SMTP from POPcon, so if there is such a connector modify it too.

We can find these configuration settings under Server Configuration, Hub Transport, Receive Connectors, Properties of the individual Receive Connector:

Open the Permission Groups tab and check the Anonymous Users option to allow POPcon to connect to this receive connector.

This will allow email transfers from POPcon to Exchange without prior authentication again.



My Exchange 2007 or 2010 does not accept emails larger than 10MB. What can I do?

This is due to the default limit of 10MB in the Exchange 2007 receive connector. You can find this setting in the Exchange Management Console under Server Configuration, Hub Transport, Receive Connectors, Properties of the Default Receive Connector:

The Maximum message size is fixed to 10240KB (10MB) by default on the General tab of these properties Change that to 102400 (100MB) in order not to allow longer emails to come through. You can always limit individual user’s allowed maximum email sizes.




You can also use the Exchange Management Shell: View current limits with the Exchange Management Shell command

get-receiveconnector | select identity,maxmessagesize
and change them with
set-receiveconnector "Connector Name (from above)" -maxmessagesize 50MB
or
set-receiveconnector "*default*" -maxmessagesize 50MB
to 50MB for example.

What does the error message "452 4.3.1 Insufficient system resources" mean?

This error message is generated by Exchange and just relayed by POPcon. With this SMTP error message Exchange is telling us that no new emails are accepted because the harddisk space is less than 4GB.

You need to clear disc space for Exchange to accept new emails and then move the Emails that POPcon moved into the BADMAIL folder as *.msg files into the PICKUP folder (both in the c:\program files\X86\POPcon folder) to have them resent to Exchange.

This is a MS TechNet article on the Exchange feature: Back Pressure.


Want to make sure this never happens to you again? Check out our new product ServerPulse. ServerPulse monitors your server and immediately sends you a text message to your mobile phone and an email if the server is down and (more importantly in this case) also warns you when the harddisk is nearly full. So you can move and make more room before Exchange stops receiving emails!



Exchange 2007 rejects POPcon emails with "550 5.7.1 Unable to relay". What do I do?

This error message indicates that your Exchange 2007 server is not accepting the email because it thinks it is not the authoritative server for the domain of the recipient and assumes it should relay the mail back to the internet (and rejects that).

You need to add your external internet domain name to the list of accepted domains in the Hub Transport:

  1. Open the Exchange Management Console
  2. Expand the Organization Configuration, select Hub Transport, and then in the work pane, click the Accepted Domains tab

  3. In the action pane, click New Accepted Domain. The New Accepted Domain wizard appears.
  4. On the New Accepted Domain page, complete the following fields:
    • Name Use this field to identify the accepted domain in the user interface. You can type any name that you want.
    • Accepted Domain Use this field to identify the SMTP namespace for which the Exchange organization will accept e-mail messages, i.e. "yourdomain.com"
  5. After you complete these fields on the New Accepted Domain page, select Authoritative Domain to set the accepted domain type
  6. Click New.
  7. On the Completion page, click Finish.

If you already have the domain named listed in the Accepted Domains List then this could mean that POPcon isn't actually talking to Exchange SMTP but to some other SMTP service active on the same server.

In that case it would be best to circumvent the other SMTP service by moving both the Exchange SMTP and POPcon to another IP port. By default IP port 25 is used for SMTP.

You can change the port number (for example to port 26) in the POPcon configuration under EXCHANGE and in Exchange and in the Exchange Management Console under Server Configuration, Hub Transport, Receive Connectors, Properties of the Default Receive Connector.



There are .msg files in the POPcon folder with undistributed emails left after we solved an Exchange problem. How can we redistribute them?

One word about .msg files in the c:\program files\POPcon folder: A .msg file contains an email that was downloaded by POPcon and stored in that file until it gets distributed to your Exchange Server. These files are in simple text format. You can view them with notepad or any other text editor.

POPcon does not leave .msg files in the folder for long - after distributing them to Exchange the files are deleted at the end of each mail cycle. If you notice any buildup of .msg files in the folder there must be an error during the transfer to Exchange. Please check the POPcon log file (C:\Program Files(x86)\POPcon\POPconSrv.log – open with notepad) for error messages and resolve those.

You can flush POPcon's queue from unwanted messages by moving the .msg files away from the POPcon program folder. POPcon removes the corresponding message from it's queue when the message file is removed from the folder.

If you want POPcon to redistribute .msg files that where moved out of the POPcon program folder again you can do this by moving the files into the PICKUP folder (inside the POPcon program folder). POPcon picks up any .msg files found in the PICKUP folder during the next mail cycle and will attempt delivery to Exchange again.



Emails to recipients that are unknown in my Exchange/ActiveDirectory organization are rejected by my Exchange Server and seem to remain in POPcon's queue.

You need to disable Recipient Filtering in the Exchange System Manager to allow Exchange to send a non-delivery report back to senders trying to reach a non-existing mailbox instead of Exchange dropping the connection in such situations.

Open the Exchage System Manager and go to "Global Settings", "Message Delivery", "Recipient Filtering" tab, uncheck Filter recipients who are not in the Directory. That will solve the problem.

Exchange 2003 Server Global Settings

Exchange 2003 Message Delivery Properties

As an alternative you can use a new feature available in POPcon version 3.00: In the POP3 properties choose "re-route mail to unknown recipients" and have email to unknown recipients routed to your postmaster or administrator account.



Does POPcon work with Exchange 2010? 2007? 2003? 2000?  5.5? SBS versions?

Yes - POPcon only uses the SMTP protocol to transfer Email to exchange server, which makes it pretty independant of the exchange version used.

We tested POPcon with Exchange 2010, Exchange 2007, Exchange 2003, Exchange 2000 and Exchange 5.5 as well the SBS versions of Exchange on Windows 2008R2 Server (x64), Windows 2003 Server (x86 and x64) and even NT 4.0.

POPcon also works with other mail servers that feature SMTP mail inputs: Lotus Notes, Tobit David, etc..

Check out our Exchange configuration guides in the support area.



The distribution of incomming emails from a mailing list does not work correctly. What can I do?

The handling of mailing list emails is an inherent problem with multidrop/catch-all/domain-wide POP3 accounts. It is actually not a problem of POPcon specifically.

Many mailing lists do not display the recipient email address in the TO: header field and under some circumstances (mail servers in between and their configuration) the target email address information is completely stripped from emails when they arrive at the pop3 connector (such as POPcon). Under such circumstances it is not possible for any pop3 connector to distribute the email correctly. About the only thing that can be done about this is to switch to individual POP3 mailboxes for each users.

Fortunately with many ISP email servers though, the original recipient information is kept in a special mail header field and we might be able to suggest a special POPcon configuration or even change POPcon to find the information in these cases. We did so successfully many times in the past. Please send us a copy of a sample email header from one of these problematic emails (Outlook: View-Options) and we will see what we can do.



What do I do if all emails get forwarded to the postmaster because they "do not have local recipients"?

This message means the email does not contain at least a single recipient in it's "TO:", "CC:", etc header fields that reside in one of the "accepted recipient domains" configured in POPcon.

The error only arises with catch-all style POP3 mailboxes, so first make sure the POP3 mailbox you are downloading from is actually a domain-wide catch-all style mailbox. If it is actually a mailbox that receives email only for a single user instead of a whole domain then you can solve this problem bei just changing the configuration of the mailbox in POPcon to "single user mailbox" and configuring the correct forwarding email address of the user in your exchange that receives the email from this mailbox.

If you are actually downloading mail from a catch-all style mailbox POPcon needs to know which domains you do consider your own, i.e. all the domains that you receive email for. Only these recipients are routed to your exchange server to keep the exchange server from bouncing the other recipients (think of an email with multiple recipients).

You can add your internet domain(s) to POPcon's list of "accepted recipient domains" on the POP3/IMAP configuration page (format: "yourcompany.com", without "@" or "*").

POPcon POP3 properties



POPcon hangs when my virus scanner deletes infected *.msg files from the POPcon folder!

We noticed this problem and corrected it in version 2.8.

POPcon can't just ignore such vanishing temporary files but from v2.80 on it merely sends and email to the postmaster when this happens instead of trying to find the absent file again and again.

Please update your POPcon to a version after 2.80 (free for all current customers) to solve this problem.

Also, some antivirus solutions actually stop the process writing an infected file on the harddisk. In this case there is nothing POPcon can do because it is the POPcon servcie process that gets stopped. In these cases you need to exclude the c:\program files(x86)\POPcon folder from being scanned.



Can I start the mail retrieval cycle from the command line (.bat, etc.) ?

Yes we created a small utility POPconTrigger just for this purpose. Use POPconTrigger like this:

popcontrigger SERVER

Instead of "SERVER" you need to enter the name of the server POPcon is running on. This parameter is only needed if POPcon is running on a different computer than POPconTrigger.



POPcon downloads email ok, but can't reach my exchange server - what can I do?

Check the following:



BCC recipients do not receive the email, although recipients listed under TO: and CC: do. Any hints?

BCC can be tricky with multidrop/catch-all style POP3 accounts. It is not a problem of POPcon specifically. The general problem with BCC is that the BCC recipient is (for obvious reasons) not mentioned in the normally visible standard email headers.

With most ISP email servers though, the original recipient (BCC) information is kept in a special non-standard mail header field and normally POPcon will find it there. If you send us a copy of the email headers of one of those emails that POPcon could not correctly address we can advise you which settings to chose in POPcon. You’ll find the email headers in Outlook when you open such a mail and select VIEW .. OPTIONS.

Even if POPcon currently does not know about your specific email header we might be able to change POPcon to find the information in the next version and we definately would like to know about it!

Under some circumstances (mail servers in between and their configuration) the BCC information is completely stripped from emails when they arrive at the pop3 connector (such as POPcon). Under such circumstances it is not possible for any pop3 connector to distribute the email correctly. About the only thing that can be done about this is to switch to individual POP3 mailboxes for each user.



How can I get POPcon to not work with my ISA-Server (proxy) ?

You need to open the IP ports for POP3 and SMTP in your ISA Server. Create two packet filters:

One IP packet filter that allows POP3 accesses with the following settings:

One IP packet filter that allows SMTP accesses with the following settings:



What can I do about the error message "Host did not acknowledge DATA command [554. 5.5.2 No valid recipients]"?

If you are using Exchange 2000 Server you might want to check the following settings:

  1. Are all recipient domains you want to support added to the default policy in the recipient policies in your Exchange configuration? Check out our Exchange 2003 configuration guide, Part 1. Make sure that the check mark left of the domain in question is there as well.
  2. The relay rights in the virtual default SMTP connector: You need to give the machine that runs POPcon (even if it is the same machine that runs Exchange 2000 Server) RELAY RIGHTS. This is because often your ActiveDirectory domain will not be the same as your email domain (name).


POPconAdmin does not work or has problems communicating with my POPcon service?

If POPconAdmin does not show any POPcon servers please check the following possible reasons:

  1. The POPconAdmin is already running on that machine, i.e. in a terminal session of if you are on a terminal session on the console itself. There can only be one instance of POPconAdmin running on a machine at any time.
  2. The Windows XP Firewall (if POPconAdmin is running on an XP machine) or the ISA Server Firewall or an external Firewall device is activated and blocking IP communications between POPconAdmin and the POPcon service. Ports 22772..22774 are used, please open these ports for the machine where POPcon is installed.
  3. You are operating with two networking cards and one of them is not connected to the network. Unfortunately it is not possible to have POPcon and POPconAdmin bind to a specific networking card and if they bind to different ones they might not be able to communicate.
  4. The POPcon service was not properly started (should be automatic after the installation) - please check in your control panel - services if the service is running. If there is no POPcon service listed at all: Go to the c:\program files\POPcon folder and double-click POPconSrv.exe. A small maintenance menu wil open. Choose the "install and start service" option to manually install the service.

If all else fails you can make changes to POPcon's configuration in the meantime by using a special admin panel in POPcon's service directly by following this procedure:

  1. Stop the POPcon service (control panel - services). This is important because a running POPcon service would overwrite changes made in step 3!
  2. Start C:\Program Files\POPcon\POPconSrv.exe directly (by doubleclick or start-run)
  3. Choose to administrate the software and do your changes. This admin panel will work directly on the registry settings that are loaded at service startup time by the POPcon service.
  4. Restart the POPcon service.


Will I lose emails if my Exchange Server happens to be down when POPcon tries to send emails there?

No, emails will never be lost. POPcon uses the fully secured SMTP protocol to forward emails to Exchange. In this protocol the receipt of every single message must be acknowledged by the receivin server (Exchange) with an OK code. If POPcon can't reach your Exchange server or does not receive the OK code acknowledgement it will simply retry until the server is reachable again. POPcon stores all messages in temporary files on your harddisk - your emails are safe even if you shutdown the machine that runs POPcon or the Exchange server while POPcon is in the middle of a transfer to Exchange.

We designed POPcon to never lose any email under no circumstances whatsoever - even when you yank the power cord while POPcon downloads emails or while it forwards emails to exchange.



Is there a trace of POPcon's actions somewhere so we can check where email messages came from and where they went?

Yes, POPcon's actions are logged in the POPcon logfile POPconSrv.log in the c:\program files (y86)\POPcon folder.

You can read this log file with any text editor like notepad.

POPcon cuts down the size of the log file once a day to the value set on the GENERAL configuration page, removing older entries first. You can extend the length of the log file or even switch to individual daily log files without size restrictions on the GENERAL configuration page in the POPcon configuration.



How can I get rid of downloaded emails that are stuck in POPcon's queue?

POPcon keeps downloaded but not forwarded emails in individual *.msg files in the Program Files\POPcon folder. Just remove those *.msg files that you don't want POPcon to forward to Exchange - POPcon will detect the removal and delete the mail from it's queue.

If you just move the files to another folder instead of deleting them you can have Exchange attempt delivery again by moving these files into the PICKUP folder (inside the POPcon program folder).

If you still use a POPcon version older than v2.6 matters are a little more complicated. For those versions we prepared a small tool available for download. In order to remove a message from the queue please follow these steps:

  1. Stop the POPcon service. If it is not stopped it will keep the queue in the memory buffer.
  2. Delete or rename the file messages.tmp or use the tool http://www.servolutions.com/popcon/edit_messagestmp.exe to remove individual messages.
  3. Restart the POPcon service.

After the mail is working again I'd advise you to upgrade to the latest version of POPcon. We changed the strategy of POPcons temporary buffer from one large messages.tmp file to individual email files. This helps to handle large messages and makes removing problematic messages easier. DO NOT UPGRADE TO A NEWER VERSION BEFORE YOU DISTRIBUTED ALL THE REMAINING MESSAGES! The newer versions of POPcon use another kind of temporary message store and will not be able to read the old messages.tmp file!



All emails are suddenly tagged as SPAM after a period of no problems with the antispam feature!

When this happens there must be a problem with your DNS configuration or one of the blacklist servers configured. POPcon PRO uses DNS to query these servers for the individual IP addresses found in incomming emails.

You can check DNS lookups to blacklist servers by using the PING command in a CMD window:

This command will check if the IP 192.168.1.1 is listed in bl.spamcop.net - the lookup should fail and not return an IP address:

C:\> ping 1.1.168.192.bl.spamcop.net

This command will check if the IP 127.0.0.2 is listed - most (but unfortunately not all) blacklists will list this IP for testing purposes - the lookup should work and the IP "127.0.0.2" is normally returned:

C:\> ping 2.0.0.127.bl.spamcop.net

If the first ping command does return an IP address something about your DNS setup is not correct - check routers, firewalls and use the IPCONFIG /ALL command to validate your network card setup.



POPcon does not install on my machine. What can I do?

We use InstallShield to create the installers for our software. The generated installers are excellent but on some machines with special software or hardware configurations they still fail sometimes. In these cases you can install POPcon on another machine and then transfer it to your target machine by following this procedure:

  1. Install POPcon on some other temporary machine in your network
  2. Copy over the folder C:\Program Files\POPcon to your target machine
  3. Uninstall POPcon from the temporary machine
  4. Start C:\Program Files\POPcon\POPconSrv.exe on the target machine
  5. Choose "Install and start service"
  6. Exit POPconSrv.exe
  7. Start POPconAdmin.exe and configure POPcon
  8. Create a shortcut to POPconAdmin.exe somewhere in your start menu or wherever convenient.


Exchange/SMTP connection was unexpectedly closed or error message "454.5.7.3 Client does not have permission to submit mail to this server."

Exchange 2007: The most common cause of this is the Windows "Simple Mail Transfer Protocol" service installed and started. This service is then competing with the Exchange SMTP service for the one SMTP IP port (25) and thereby taking over the email stream from POPcon. Open Administrative Tasks, Services and DISABLE the "Simple Mail Transfer Protocol" service. to solve this.

Another possible reason with Exchange 2007 is that the Exchange built-in Antispam blocks certain messages. Switch off the blocking in Hub Transport, Anti-Spam and add your own server IP to the IP allow list to solve this.

A third possibility is the interference from firewall appliances or antivirus software. If you are using the SonicWall appliance for instance please make sure to uncheck the option to stop office documents with vba content. In general, configure firewalls and antivirus software not to just close a connection but to return error messages or to drop the emails silently.


Exchange 2003: The most common cause is sender, recipient or intelligent filtering turned on in Exchange. Check these configuration pages in the Exchange System Manager:

Ensure that the "Drop connection if address matches filter" option is turned off:

The connection filter configuration should be empty:

And the recipient filtering option should be turned off (ensure that "Filter recipients..." is not activated):

 

On the "Intelligent Message Filtering" tab, in the Gateway Blocking Configuration please ensure that "When blocking messages:" is set to "No Action" or anything else but not "Reject".

Intelligent Message Filtering tab

 

09-11-2005: Just found out that some antivirus products, notably "Symantec Mail Security" also have a built-in antispam feature that causes the same error message.

 

Another possible cause is disallowed unauthenticated access in the Exchange "Virtual Defaultserver for SMTP". Please allow access without authentication like this:

• You will find the settings for the SMTP server under Servers/Protocols/SMTP/Default SMTP Virtual Server. Open the properties by right-clicking on the Default SMTP Virtual Server and choosing "Properties":

 

• The settings on tab “General” can normally be left to the defaults.

 

 

• On the tab "Access" you can find some configuration settings that might interfere with POPcon.

 

 

 

 

• POPcon only works with a standard SMTP connection WITHOUT authentication, so allow "Anonymous access" in the "Authentication" dialog:

 

You need to stop and restart the Virtual Defaultserver for SMTP in order for this change to take effect!



How can I resend already downloaded messages?

Q:

Date:  Wed, 29 Jun 2005 16:36:04 -0400
Subject: How to download already downloaded emails again?  

Hi,   I have installed Popcon It has read 125 messages and forwarded them.  I had the forwarding
email setup wrong - I am leaving messages on server for now - I want to
redownload and resent to the correct email address 
How do I do this?

A:

Hi,

you can do it like this:

  1. Stop the POPcon service (control panel, services)
  2. Delete the files c:\program files\POPcon\msgdids.tmp and msguids.tmp. These files is were POPcon stores the message IDs of the messages it has already downloaded.
  3. Restart the POPcon service.
  4. during the next cycle POPcon will download and distribute the emails again.

Please note that this will only work when you configured POPcon to leave messages on your POP3 server, at least for a fixed number of days.



How do I configure Exchange and POPcon if I want to handle only part of a domain?

Q:

-----Original Message-----

Date: Mon, 27 Jun 2005 14:10:11 -0700 (PDT)
To: support@servolutions.com
Subject: Exchange configuration

 

Hi,

I've installed Windows SBS to a small office. They are part of a large company and they have a SBS server in their head office. Actually they have mail accounts in the ISP side. What they do is created the mail account in the exchange server and gets downloaded by the ISP side.

 

I went through your article how to config the exchange server. But my problem is the registered domain name. Head office is already using the registered domain name so it cannot be used in the branch office. And my requirement is to download the e-mails to the exchange server from the ISP. These mails accounts will only be the users in that office and rest of the other e-mail should not be downloaded. So how can I do this? In the head office they use an Exchange configuration setting to forward any undeliverable message to the ISP so then it'll send them to the proper persons that having the same e-mail alias and to the other e-mail address. Well I'm new to exchange stuff so if you find something unclear in this mail ply let me know so I can detail give info abt it.

A:


Hi,


here is what I think you should do if you are using individual POP3 mailboxes on your ISPs POP3 server:


  1. Configure your exchange server (Exchange System Manger, Recipients, Recipient Policies, Properties of the default policy) to accept email for an internal domain name called branchoffice.local or something like that but different from your standard domain name (let's call that company.com). Do NOT add company.com here! This ensures that email to some user @company.com gets sent out to the internet. If you add a domain here, exchange will not send out the email to the internet because it already knows it is handling that domain itself.
  2. Give every user in ActiveDirectory two SMTP email addresses: One in company.com (make that the default address) and one in branchoffice.local. Make sure the part before the "@" matches in the two addresses. This ensures that your Reply-To Addresses in emails that your users send out will be user@company.com while allowing POPcon to transfer emails to the user via the user@branchoffice.local name.
  3. Configure POPcon to download email from the individual POP3 mailboxes and to always forward the mail from the account to the respective user@branchoffice.local.

If you can't use individual POP3 mailboxes on your ISPs POP3 server but need to use a catch-all type of mailbox you need to configure your system like this:

  1. Just as above: Configure your exchange server (Exchange System Manger, Recipients, Recipient Policies, Properties of the default policy) to accept email for an internal domain name called branchoffice.local or something like that but different from your standard domain name (let's call that company.com). Do NOT add company.com here! This ensures that email to some user @company.com gets sent out to the internet. If you add a domain here, exchange will not send out the email to the internet because it already knows it is handling that domain itself.
  2. Just as above: Give every user in ActiveDirectory two SMTP email addresses: One in company.com (make that the default address) and one in branchoffice.local. Make sure the part before the "@" matches in the two addresses. This ensures that your Reply-To Addresses in emails that your users send out will be user@company.com while allowing POPcon to transfer emails to the user via the user@branchoffice.local name.
  3. Configure POPcon to download email from the catch-all style POP3 mailbox and add your internet domain name ("domain.com") to POPcon's list of accepted recipient domains on the POP3/IMAP page.
  4. On the ADVANCED configuration page configure the "Auto replacement of recipient domains" feature by adding a replacement of "domain.com"->"branchoffice.local". This will cause POPcon to automatically replace every instance of "domain.com" in recipient addresses with "branchoffice.local".


How can I diagnose malfunctioning antispam blacklist server lookups?

Q:

-----Original Message-----

Date: Mon, 4 Jul 2005 21:22:56 -0300
To: "Claus Christensen"
Subject: RE: (Case 3768) AntiSpam Blacklists

Hi Claus,

I can browse to the blacklists just fine with Internet Explorer, which means that DNS is working fine, however it keeps saying that the blacklist failed during testing in POPcondmin and won't be used. How can I diagnose the  blacklists on my system and what does POPcon do to "test" them?

 

 

A:

Hi,

you are right - DNS lookups are used to check if a particular IP is listed in a blacklist. But the website for a particular list and the list itself are separate DNS entries, so successfully browsing to a lists site does not automatically indicate that the DNS lookup will work.

Before using a blacklist POPcon checks if the IP "192.168.1.1" is listed - it should never be - and if it is that particular blacklist is not used. You can do the same check using the PING command in a CMD window:

This command will check if the IP 192.168.1.1 is listed in bl.spamcop.net - the lookup should fail and not return an IP address:

C:\> ping 1.1.168.192.bl.spamcop.net

This command will check if the IP 127.0.0.2 is listed - most (but unfortunately not all) blacklists will list this IP for testing purposes - the lookup should work and the IP "127.0.0.2" is normally returned:

C:\> ping 2.0.0.127.bl.spamcop.net

If the first ping command does return an IP address something about your DNS setup is not correct - check routers, firewalls and use the IPCONFIG /ALL command to validate your network card setup.

 



What could be the reason for ''Mail transfer to exchange failed, reason: Connection to host denied'' ?

Q:

-----Original Message-----

Date: Thu, 7 Jul 2005 09:05:13 +0100
To: support@servolutions.com
Subject: Popcon support

Dear Support,

I have been using popcon with no problems for a couple of years now, but having applied a couple of updates to windows 2003 and exchange 2003, suddenly it no longer seems to be working properly and i cannot get to the bottom of it

It is all setup correctly according to your setup guide, but returns the error 'Mail transfer to exchange failed, reason: Connection to host denied' whenever it tries to connect to my Exchange server.

I have attached a screen shot of the error.

Please contact me asap as we cannot currently recieve any emails.

 

A:

Hi,

 

this error means that your Exchange server is not answering on the SMTP port 25.

There could be a couple of reasons for this but these days this is most often caused by some Antivirus (notably McAfee) or Firewall software blocking this port. So please use this list to check the possible reasons:

  1. Please check your antivirus software first for options of protecting SMTP or Port 25 and switch off the blocking.

  2. If it is not the antivirus software the next point to check is any firewall or firewall software - even if this connection is inside one computer the network traffic is often routed through the firewall and could thus be blocked.

  3. Another possibility is that the port number of the Exchange SMTP virtual server had been changed by some filtering software that was installed in front of the SMTP port - many of these products install themselves by changing the port number of the Exchange SMTP port, then serve port 25 themselves and route email to the changed Exchange SMTP port. Caution must be used if this kind of software has been uninstalled or disabled - the Exchange SMTP port number might not have been changed back to 25 where POPcon expects it. Check under Exchange System Manager, Servers, your server, protocols, SMTP, properties of the Virtual Defaultserver for SMTP, General, IP-Address Advanced.

  4. The computer where POPcon is installed on might not be allowed to connect to the SMTP server of Exchange. Check the settings under Exchange System Manager, Servers, your server, protocols, SMTP, properties of the Virtual Defaultserver for SMTP, Access, Connection.

  5. It could also be the antispam portion of any antivirus software installed on the server. Most antivirus packages nowadays include antispam features you might not even be aware of. In the Symantec mail security product for example you need to uncheck the rejection options here:


    and:


    In general, set any antispam or antivirus software to NOT reject emails but re-route to alternative recipient if possible.


Often it is helpful to independently check if port 25 is working and connected to Exchange. You can use the windows utility TELNET to do this. Open a CMD window and type TELNET yourservername 25

The Server should return a greeting string that looks like "220 yourserver.yourdomain.local Microsoft ESMTP MAIL Service, Version: 6.0.3790.211 ready at  date". If it does not return a string you know that the Exchange SMTP is still not available on port 25. If it returns a totally different string you might be able to discern the name of the product currently serving 25 from it and thus where to look next.



Exchange does not accept some email from POPcon and keeps saying "550 5.7.1 Requested action not taken: message refused"!

Q:

-----Original Message-----

Date: Mon, 1 Aug 2005 09:17:00 -0500
Subject: Exchange refuses to take email from POPcon

Dear All

We have a version of POPcon, and we have received this error: "08/01/05 08:28:38: Mail transfer to Exchange failed, reason: Exchange did not acknowlege sent data / end-of-mail marker. [550 5.7.1 Requested action not taken: message refused"]

 

Can you help me and tell me which is this error and how resolve.

 

A:

Hi,

this error means that your Exchange server's intelligent message filtering option is enabled and configured to reject filtered emails. You need to change the configuration to either "No Action" (that will cause the filtered messages to end of in the end users Junk E-Mail folder) or "delete":

Open the Exchange System Manager, Global Settings, Message Delivery, Properties:

 

Then switch to the "Intelligent Message Filtering" tab:

Intelligent Message Filtering tab

In the Gateway Blocking Configuration please ensure that "When blocking messages:" is set to "No Action" or anything else but not "Reject".

09-11-2005: Just found out that some antivirus products, notably "Symantec Mail Security" also have a built-in antispam feature that causes the same error message.

 



POPcon always forwards my email to TWO Exchange mailboxes: The real recipient and a recipient named like my catch-all mailbox at the ISP. How do I stop that?

Q:

-----Original Message-----

Date: Mon, 3 Aug 2005 13:18:25 -0400
Subject: POPcon double forwarding

Hey Claus,

We are using a single mailbox at our web hosting company to catch all email destined for the domain @ourcompany.com. The mailbox is "catchall@ourcompany.com". POPcon downloads all mail just fine and also forwards it to the correct recpient. But every email is also forwarded to "catchall@ourcompany.com" although that address is nowhere in the TO: header of those emails.

Can you help me and tell me what causes this problem and how to resolve it?

Thanks,

Mark

 

A:

Mark,

POPcon does not only evaluate the TO: and CC: mail header fields because these frequently do not contain the real recipient information (think BCC) but instead uses many more header fields. You can ake a look at the "Advanced" configuration page, there is a list of all the supported header fields. Unfortunately your catch all mailbox name and the address is bound to wind up in some of the email headers where POPcon sees it. Plus it is a valid address inside your domain, so POPcon thinks the email should go to this recipient as well.

 

Solution: Very easy - just enter your catch-all address "catchall@ourcompany.com" on POPcon's "Advanced" configuration page under "remove string from start of recipient addresses" and activate that feature. That will cause this email address to be removed from all the recipient addresses found in the mail headers and will cause nothing to happen in case it is not present among these addresses. The only problem with this solution is that you can not use the catchall mailbox address for regular email since no email to this address will now get through. If you chose a comon address (info@ourcompany.com or postmaster@ourcompany.com) that you need to use for regular email please go to your ISP and change that name first to something that your don't use as a regular mail address and then enter that new address on the ADVANCED configuration page instead.

 

Best Regards,

 

Claus

 



POPcon says that it drops copies of downloaded email - what causes this message?

Q:

-----Original Message-----

Date: Mon, 1 Aug 2005 16:56
Subject: POPcon dropping mail

Gday Claus,

I get this error in POPcon log. What is it? And how can I avoid it?

      same Message ID [long string of characters] already sent to localuser@mydomain.com - dropping this copy

 

A:

Hi,

 

this is not an error - POPcon keeps duplicate emails from happening by comparing the recipient address and message ID to a list of emails that it already transfered to your exchange server. If it already did transfer this exact message to this exact mail address it will drop this copy and not forward it again.

Duplicates often happen when somebody sends a mail to two (or more) users in your domain and you are using a domain-wide catch-all POP3 mailbox. The sending program does not know that both recipients actually share the same POP3 mailbox so it sends identical copies of the mail to the two recipients. Both copies end up in the same mailbox from where they are downloaded by POPcon. When POPcon downloads the first copy the mail headers are checked and both recipients are found in the TO: or CC: headers and POPcon forwards this first copy to both recipients. When the second copy arrives both recipients already received a copy and POPcon drops the second copy in order to keep duplicates from happening.

 

Best Regards,

 

Claus Christensen



What can I do when exchange does not accept some emails and comes up with an error message: "550.5.5.1 user unknown" or "503.5.5.2 need Rcpt command" ?

Exchange 2007 and higher:

These are the most probable causes:

Exchange 2003:

The most common cause is recipient filtering in Exchange, but please check also sender, connection or intelligent filtering.

Check these configuration pages in the Exchange System Manager:

On the "Recipient Filtering" page the option should be turned off (ensure that "Filter recipients..." is not activated):

 

Ensure also that the "Drop connection if address matches filter" option is turned off on the "Sender Filtering" page:

 

The connection filter configuration should be empty:

 

On the "Intelligent Message Filtering" tab, in the Gateway Blocking Configuration please ensure that "When blocking messages:" is set to "No Action" or anything else but not "Reject".

Intelligent Message Filtering tab

 

09-11-2005: Just found out that some antivirus products, notably "Symantec Mail Security" also have a built-in antispam feature that causes the same error message.



The new version 3.20 of POPcon can download IMAP email. Can it download email from AOL accounts with this?

Yes, POPcon v3.20 can be used to download email from AOL accounts to your Exchange Server. AOL uses IMAP server on. imap.aol.com to allow outside access to their users mailboxes.

This is the POPcon POP3/IMAP server configuration you can use to access your AOL accounts:

 

As you can see, the server type needs to be set to "IMAP", the IP portnumber consequently is 143 and the server name is imap.aol.com. Use your normal AOL username and password to access your mailbox this way. AOL mailboxes are normally single-user mailboxes, so you should set POPcon to forward the email to a single SMTP-email address.

 



Can I use POPcon to download email from Gmail accounts?

Yes, POPcon can download email from POP3-SSL accounts since version 3.00. Since Gmail allows outside access to their users mailboxes via this protocol, you can use POPcon to download messages from your Gmail account and have them included in your standard Exchange Inbox.

This is the POPcon POP3/IMAP server configuration you can use to access your Gmail accounts:

 

As you can see, the server type needs to be set to "POP3-SSL", the IP portnumber consequently is 995 and the server name is pop.gmail.com. Use your normal Gmail username and password to access your mailbox this way. Gmail mailboxes are normally single-user mailboxes, so you should set POPcon to forward the email to a single SMTP-email address.

 



"Out of Office" messages are returned to internal users but not external users on the internet. Is this a problem of POPcon?

Q:

-----Original Message-----

Date: Fri, 11 Nov 2005 15:56
Subject: Problems with "out of office" messages

Hi,

We are having problems with "Out of Office" messages.

Internal messages to the user get the desired reply whilst external messages from other internet domains don't. We are running Exchange 2003 SBS with POPcon version 3.22. Is this a problem of POPcon?

 

A:

Hi,

this is a problem of the default settings of Exchange and can easily be fixed:

Using the Exchange System Manager, open Global Settings > Internet Message Formats, right click "default" (on the right hand panel). Select Properties > Advanced. Tick the "allow out of office responses" box. Click apply/ok.

Best Regards,

Claus Christensen

 



Why does POPcon need to know the "accepted domains" on the POP3/IMAP config tab?

The need to filter incoming mail so only that sent to one of the accepted domains is due to how POP3 and SMTP mail retrieval/sending works with multiple receivers. This is no problem specific to POPcon, every program retrieving mail by POP3 and forwarding it by SMTP must need to know what domains it is allowed to accept mail for and ignore all other mail.

Consider this example:

Angie at ABC corp. wants to send a mail to both her manager Bob and to you, her client. So she sends the mail:

TO: you@yourdomain.com, bob@abccorp.com

POPcon retrieves the mail and receives no other indication about the intended receiver than what is written in the "TO:" field of the mail.

Unfortunately, the SMTP-protocol needs every single receiver decoded for it and mail server products like Microsoft Exchange™ will complain with a message to the postmaster about every mail they received for another domain. In case of the above mail this would only mean one correctly forwarded message (you@yourdomain.com and one complain-message (bob@abccorp.com: receiver does not exist at this domain) to the postmaster. But factor in rising amount of mails each day and then imagine the reaction to mass-mailings sometimes including dozens of recipients beside the one at your organization. Also, some mail servers will automatically reply to each message with an unknown receiver in it telling the other party the intended receiver does not exist. This would be very strange to Angie: A message from your server, telling her that bob@abccorp is an unknown recipient.

By giving POPcon a list of accepted domains, we enable it to filter only those recipients with specific domain names that EXCHANGE or whatever mail server you use will then accept.



How can I enable non-delivery reports (NDRs) to external mail senders?

The automatic non-delivery reports (NDRs) in reply to emails sent to non-existing addresses in your organisation are a feature of Exchange and POPcon does not interfere with them. You can enable or disable NDRs using your Exchange System Manager:

  1. Open the Exchange System Manager at Global Settings > Intenet Message Formats and right-click on "Standard" coming up on the right-hand pane, then chose "Properties".

  2. Check or uncheck "Allow non-delivery reports".



Mail does not reach mail-enabled public folders. What could be the reason?

Almost all problems with mail-enabled public folders are permissions issues. It is important to give the "Anonymous" user "Contributor" rights in order to actually receive mail in such a folder.

To check and change rights open Exchange System Manager and navigate to Administrative Groups > your administrative group > Servers > your server > First Storage Group > Public Folder Store > Public Folders and the properties of your public folder. Then go to the "Permissions" tab.

Screenshot: Public folder Permissions tab

Select the "Client Permissions" tab and view or modify your permissions settings.

Screenshot: Client permissions of a mail-enabled public folder.



Does POPcon also work with Lotus Domino Server?

Yes - POPcon and POPcon PRO both work fine with Lotus Domino and can download email for your entire Notes organisation.

07-2006: New POPcon Notes is the special version of POPcon for Lotus Domino. This version now also supports rerouting to a different Domino user if the email was sent to a non-existing email address.



Only messages less than 10MB in size seem to come through, does POPcon impose a size limit?

No, POPcon works fine with emails larger than 100MB but Exchange is normally set up to not accept Emails larger than a certain size. Unfortunately there are three different settings you need to check:

  1. In the Exchange System Manager > Server > YOURSERVER > Protocols > SMTP > Properties of the Virtual Defaultserver for SMTP.

    Message size limit on the Exchange Properties of the Virtual Defaultserver for SMTP


  2. In the Exchange System Manager > Global Settings > Properties of Message Delivery > Defaults.

    Message size limit on the Exchange Message Delivery Properties


  3. In the Active Directory entry of the individual user > Exchange General tab > Delivery Restrictions.

    Message size limit on the Active Directory user delivery restrictions





Windows Data Execution Prevention is stopping or crashing the POPcon antivirus engine. What can I do?

The Windows Data Execution Prevention can sometimes interfere with the operation of the POPcon PRO antivirus engine. If you experience crashes of the antivirus engine (popconscan.exe) or problems with the virus detection please check the setting of the DEP:

  1. Open up Control Panel > System > Advanced:


  2. Choose Performance Settings and then go to "Data Execution Prevention"


  3. Select "Turn on DEP for essential Windows programs and services only".

 



I want POPcon to forward some accounts to a non-local mailbox on the internet but that does not work. How can I do this?

POPcon can only forward emails to your Exchange server. So if you chose a non-local email address for the postmaster or mailbox forwarding addresses in POPcon the mail still gets forwarded to Exchange and not back to the internet. Your Exchange Server does not accept email save for it's own domain configured under Echange System Manger > Recipients > Recipient Policies > Properties of Default Policy. If POPcon was to forward to any internet mail address it would need to have more information like an SMTP relay server, account and password information and so on.

But you can easily create a mail-enabled contact on your Exchange server that relays email back to the internet:

  1. Open up Active Directory Users and Computers applet and choose New > Contact:

  2. Add contact details:

  3. Enter the EXTERNAL mail address on the internet where the email should get forwarded to:

  4. Finish the new contact wizard and open up the properties of the newly created contact:

  5. Go to the E-mail Addresses tab and chose "New", then select "SMTP Address":

  6. Enter a new INTERNAL address in your own domain like all the other addresses that POPcon can already forward to:

  7. Now you can use janeathome@myserver.local as forwarding address anywhere in POPcon and have all emails forwarded to janedoe@gmail.com.



Exchange does not accept any email from POPcon. Error message: "530 5.7.0 Must  issue a STARTTLS command first"

POPcon needs to connect to the SMTP protocol in Exchange without authentication. This error indicates that Exchange was configured not to accept connections without authentication. You need to change the configuration like this:

You will find the settings for the SMTP server under Servers/Protocols/SMTP/Default SMTP Virtual Server. Open the properties by right-clicking on the Default SMTP Virtual Server and choosing "Properties":

 

The settings on tab "General" can normally be left to the defaults.

 

 

On the tab "Access" you can find some configuration settings that might interfere with POPcon.


POPcon only works with a standard SMTP connection WITHOUT authentication, so allow "Anonymous access" in the "Authentication" dialog:



Why is the spam checking taking so long? It takes 30 seconds for a single message!

Of course it should not take that long. Under normal circumstances the spam checking, even with the standard 8 or 9 blacklists all active only takes less than two or three seconds.

If it takes longer than there the cause is most probably one of two possible problems:

  1. One of the used antispam servers does not exist any longer or is slow to respond. NOTE: As of 05-2007 the popular list.dsbl.org is no longer available. Please remove this list from your configuration!
  2. A problem with the DNS set up on the machine or network. In most cases it's the problem of a defunct or no longer available DNS server entered previously in the list of DNS servers to contact that resides on your router or firewall. Please check the router list of DNS servers and reduce it down to only one DNS server. That will solve the problem.

    Why DNS? The internet antispam blacklist servers are querried by using DNS lookups. POPcon creates a name to be looked up by combining the IP adress to be checked with the blacklist server name. If the resulting name lookup is successful it means the IP is listed. If the lookup fails (nothing returned) then the IP was not listed. If a bad DNS server is listed in your router then it will not normally be a problem with normal, working DNS lookups because the router just contacts the first operating DNS server if the lookup is successful. Only with POPcon's many lookups destined to fail this becomes a problem because after the first DNS server fails the lookup the router will try all the other DNS servers listed and will run into a timeout with any DNS server listed but not available.



What does the error message "[blacklist] could not be tested and will not be used" mean?

This error message means that POPcon tried to test a specific internet antispam blacklist server and found it to tag EVERY ip address as spam source. Since the blacklist queries are actually DNS resolutions this points to problems with the DNS system. This kind of error often happens when either a router is configured to point every failed DNS resolution to some company website or (more often) when the local network card is configured to add a suffix to every query. Please check the tcp/ip protocol settings (advanced) of your local network card for this!

Why DNS? The internet antispam blacklist servers are querried by using DNS lookups. POPcon creates a name to be looked up by combining the IP adress to be checked with the blacklist server name. If the resulting name lookup is successful it means the IP is listed. If the lookup fails (nothing returned) then the IP was not listed.



Mails to mail-enabled public folders end up as posts instead of as emails. Can that be changed?

You can change this behaviour in Exchange 2003 by setting a simple registry entry:

Under the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\MSExchangeIS\Public-<GUID>

you need to create the key "Incoming defaults to IPM.Note" as a DWORD

The value 1 means incoming emails show up as IPM.Note (normal email)

The value 0 means incoming emails show up as IPM.Post (posted object)

The Microsoft Exchange information store service must be restarted after changing the value in the registry.

Thanks to Richard Mastny, LogoiX for notifying us of this solution!



How does the POPcon PRO antispam feature work / why is it not 100% accurate?

The POPcon Antispam function is based (apart from the self-defined black- and whitelists for senders or words in the subject or mail text) on open internet DNS-Blacklists.

These DNS blacklist server list IP addresses (not email addresses!) that have been caught sending out spam before. POPcon checks incoming emails for whether or not they come from one of these IP addresses listed on the blacklist servers. The content of the email is not relevant to this check.

The blacklist servers on the other side get their information about spam senders from so called “spamtraps”. Spamtraps are email addresses that are not used for emailing at all but just sit there and wait for incoming spams. Various ways are used to make these email addresses known to spammers but not to normal users. Any incoming email is automatically checked for the IP address of the sender and that IP address is then listed on the blacklist server in real time.

You can add more antispam servers to POPcon’s list on the SPAM tab in the configuration. You could use this website: http://moensted.dk/spam/ to check some IP addresses of emails that got through undetected to see on which lists these IP addresses are already listed. Then add these lists to POPcon’s list of antispam servers to check. To find IP addresses of the email sender look in the mail headers (Outlook: VIEW, OPTIONS, Internet Mail Headers. Outlook 2007: Expand the Options section with the little arrow in the lower right hand to see the headers), check the Received…for headers for IP addresses.

False positives: Unfortunately spammers now often use DSL connections and even abuse other users’ computers on DSL internet connections to send out spams. This causes the IP addresses of public DSL carriers to often land on the blacklist servers as spam sender addresses. Even worse, using DSL means users get assigned a new IP address out of the carriers IP range once every 24 hours meaning that normal users sometimes get IP addresses just abused by a spammer during the last 24 hour period and email coming from this normal user then to the blacklists looks as if it is still related to the spammer. All the big carriers try to get their IP addresses removed frequently from the blacklists, but this takes time and in the meantime normal user’s email is sometimes tagged as spam – false positives.

Spam not detected: On the other hand it does take some time for a fresh IP address to get listed on the blacklist servers once a spammer starts to send out spam to his lists of millions of emails. During this time, the DNS blacklist method can not detect spam.

But even a text analysis that looks for certain keywords is not very accurate because the spam senders nowadays always “decorate” the notorious words like “v1-a.gr a” or even use non-OCR-able images instead of text.

Antispam will stay a hot topic and we will continue to work on this feature in POPcon. If you have any ideas on this please let us know at whishlist@servolutions.com.



What is the shortest mail download interval supported by POPcon

You can configure POPcon to download every minute to achive an almost instantaneous download of new emails. This setting does not cause any problems if the mail download occasionally (or even always) takes longer than the interval configured. In those cases POPcon just starts the next cycle at the next full minute after the current cycle ended.



POPcon moved emails in the TOOLARGE or BADMAIL folders. How can I resend them to Exchange?

POPcon only moves emails into these folders when Exchange does not accept them during the SMTP transfer.

When you removed the size limitation in Exchange or changed the anti-spam settings you can have POPcon retry the transfer of these messages to Exchange by moving the files from the BADMAIL or TOOLARGE folders to the PICKUP folder.

POPcon picks up message files from the PICKUP folder at the beginning of the next mail cycle and transmits them to Exchange along with the other new emails

You can find all these folders under C:\Program Files\POPcon (or C:\Program Files\X86\POPcon under Windows 2008).



What does a "421 4.4.1 Connection timed out" Exchange 2007 SMTP error message mean?

This error message means that Exchange closed the SMTP connection while POPcon was still transmitting Emails.

Normally this is not severe because POPcon will just continue to transfer the rest of the emails in the next mail cycle.

The cause of this problem is the default ConnectionTimeout parameter of Exchange 2007 receive connectors. By default this timeout is set to 10 Minutes maximum length of any given SMTP session.

You can use this Exchange management shell command to set a longer SMTP connection timeout:

Set-ReceiveConnector "*default*" -ConnectionTimeout 01:00:00



My Exchange 2007 only accepts one or a few messages at a time from POPcon. How can I increase the number?

Exchange 2007 includes the parameter MaxRateLimit in the receive connectors configuration. It limits the number of emails Exchange will accept from any one source per minute.

You can increase this number with the following Exchange management shell command:

Set-ReceiveConnector "*default*" -MaxRateLimit 200



Error message "Exchange aborted receiving the message after 2xxxx bytes." - what to do?

If you see the error message Mail transfer to Exchange failed, reason: Exchange aborted receiving the message after ***** bytes. This is probably due to a message size limit in the virtual SMTP server but you are sure it is not the message size limit in the Exchange server receive connector then it probably is the Exchange 2007 antispam feature.

You need to add your server's IP address to the IP allow list in the Exchange Management Console, Server Configuration, Antispam to solve the problem.



Why doesn’t my new distribution group accept emails from outside?

If you create a new distribution group in Exchange 2007 or Exchange 2010 the default message delivery restrictions prevent email from outside, i.e. without prior authentication, to be forwarded to the lists members.

You need to change the restrictions in the Exchange management console > Recipient Configuration > Distribution Group > Properties of your new distribution group > Mail flow settings > Message Delivery Restrictions: Uncheck the option “Require that all senders are authenticated”.


This is the Exchange management console after opening Recipient Configuration > Distribution Group:

Then open the Properties of your distribution group and select Mail flow settings:

There open the Message Delivery Restrictions and Uncheck the option “Require that all senders are authenticated”:

That is it, now your distribution group will accept emails from the internet, i.e. unauthenticated senders.



CSCatchAll frequently asked questions:

How do I configure CSCatchAll? The Administrator utility only allows me to enter a license code.

You don't.

It may seem strange, but CSCatchAll does not need any configuration at all!

But how do you configure the user that will receive the catch-all emails for a given domain? Very easy: Just add the smtp email address "catchall@domainname" to the list of addresses of that user in the active directory. Replace "domainname" with your smtp domain name.

Suppose we have a user "John Galt" that should receive the catch-all emails. As you can see below, John currently has the email addresses "john@christensen-software.com" and "johngalt@christensen-software.com" in addition to "webmaster@christensen-software.com". To make John the user receiving all the catch-all emails you just add "catchall@christensen-software.com" to the list of email addresses:

  1. Use Administrative Tools > Active Directory Users and Computers and open the properties of the user that should receive the catch-all emails that no regular other user catches. Go to the E-mail Addresses tab.

    Screenshot: active directory user - new email address

  2. Click on New... to add a new email address and choose "SMTP Address" as the type of email address to add:

    Screenshot: Choose "SMTP" as email type.

  3. Enter "catchall@domainname" as address to add. In our case it is "catchall@christensen-software.com", so in your case it will be something like "catchall@yourdomain.com":

    Screenshot: Entering the new catchall@domainname address

  4. This is the list of addresses after adding the catchall address.

    Screenshot: catchall email address added to user

    You do not need to restart CSCatchAll or reboot the server. CSCatchall will start routing emails addressed to non-exisiting users to the new catchall user John right away.

  5. If you have multiple domains defined in your Exchange Server you can add all of the catchall addresses to one user or distribute them to different users by adding the appropriate catchall@... addresses in the active directory.



    I installed CSCatchAll and configured a catch-all account but it does not seem to work at all! What can I check?

    The most common problem is a switched-on Exchange "Recipient Filtering" option. You can find the setting in Exchange System Manager > Global Settings > Properties of "Message Delivery" > Recipient Filtering. Uncheck the "Filter recipients who are not in the Directory". Unfortunatly the recipient filtering takes place before emails reach CSCatchAll and can be re-routed to the correct recipient.

    If this is not the problem in your case please check the CSCatchAll log file in c:\program files\CSCatchAll\csca.log. You can also send us part of the log with a description of the problem to support@servolutions.com for us to analyse.




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