I've got this error creeping up in my log today, any suggestions?
It seems to occur when people try to deliver quarantined mail and I've gotten some complaints that such mail is in fact not delivered.

Running 3.1.3.605 registered

12.20.06 10:00:05:965 -- (31868) Exception occurred during ProcessQuarantineQueue - Msg.LoadFromStream: Max line length exceeded.

If the events had occurred closer togeter, there may have been a correlation. They are several hours apart however, so that is less likely.

In either case, both of the errors are absolutely not normal. Could you please zip the entire logfile and email it to us at support at logsat dot com?

Received the logs. The error:

Exception occurred during TUpdateListViewQuarantineThread.Execute

is occurring when you interact with the Quarantine tab in SpamFilter's GUI, most likely when clicking on the "Refresh" button. The problem is strictly related to the user (you) interacting with the control. While the error should not happen, it does not interfere with SpamFilter's functionality. We've seen a few instances of similar errors, and are trying to fix them in the next release of SpamFilter.

On the other hand, the errors:

Exception occurred during ProcessQuarantineQueue - Msg.LoadFromStream: Max line length exceeded

are related to the specific messages being processed. In your logs, they are followed by another error similar to:

12.20.06 10:00:06:059 -- (31896) EMail from: ?????_no_reply@???????.com to: ???@??? --  was returned to sender - server error - Invalid Message file:D:\SpamFilter\queue\Ind151F.tmp

There is something in these messages that is causing the delivery to fail. Unfortunately SpamFilter by default will delete the problem-message. But...

Please change the following setting in the SpamFilter.ini file:

EnableBadMailDir=1

This will cause SpamFilter to save a copy of messages that cause delivery problems to the \SpamFilter\badmail directory. If you can then replicate the problem, a copy of the message file will be saved to that directory. You may find other message files in that directory, it does not indicate a problem, as there may be legitimate reasons for certain "bad messages".
Please zip and email us both SpamFilter's activity logfile, and a copy of the \badmail directory.

As a side note, usually there is never a need for SpamFilter to be restarted when making changes to the configuration files, but in this case SpamFilter does need to be restarted.