Improved: Now removes original email from NDRs if original too large to be accepted

Improved: Better error message if SMTP server returns verbose error message with html code

Improved: Now allows internals.log file to be switched off for data protection reasons

Bugfix: 45x "temporary" smtp error codes could cause emails stuck at 5 minute retry interval - now using normal retry limits

New: Now log file options on advanced config screen to allow daily log files and log file size limits to be changed

In Admin Test-Email now says [no connect] instead of just result code 0 when smtp relay server can't be reached

Disposition-Notification-To header now with <> around the email

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