Faulty SMTP / DKIM - 10.48 version

[cfdynamics]

Found this same subject over in the professional version forum

Suddenly getting errors and SMTP service crash issue related to DKIM signing. Have tried excluding the entire Mail Enable folder from AV scanning

Including relevant errors from the smtp debug log

08/22/24 13:14:59 Service_DumpConnectionsToFile raised an exception.
The exception occurred in : ..\SERVICES\Library\LIBappStatus.cpp, line 382

08/22/24 13:04:18 DKIM_SignMessage raised an exception.
The exception occurred in : SMTPOutbound.cpp, line 4389
08/22/24 13:04:18 DKIM_SignMessage raised an exception.
The exception occurred in : SMTPOutbound.cpp, line 4389
08/22/24 13:04:18 DKIM_SignMessage raised an exception.
The exception occurred in : SMTPOutbound.cpp, line 4389
08/22/24 13:04:18 DKIM_SignMessage raised an exception.
The exception occurred in : SMTPOutbound.cpp, line 4389
08/22/24 13:04:18 DKIM_SignMessage raised an exception.
The exception occurred in : SMTPOutbound.cpp, line 4389

[cfdynamics]

Only change to the systems are the recent August updates from Microsoft although they were installed a few days before the issue started.

[cfdynamics]

Disabled DKIM for all domains and for now at least the issue seems to be cleared...

[cfdynamics]

Installed the new version 10.49 published today hoping it would resolve the issue. No such luck... Including another entry found in the debug log

08/26/24 16:55:27 Service_DumpConnectionsToFile raised an exception.
The exception occurred in : ..\SERVICES\Library\LIBappStatus.cpp, line 341

[R4LRetro]

We're dealing with the same issue. We had a support ticket in to try to get it resolved. Support sent us a release to install and it seemed okay for a few weeks then the exception occurred again. So far its happened to us twice since that update where as it was happening nearly every week before, so there is some improvement at least but its still an issue. Supposedly it has to do with some ciphers in ME's OpenSSL implementation.

For us, disabling DKIM is not an option, especially when Google and other providers are requiring it now.

What I did was create a scheduled task that runs a POSH script to scour the current SMTP debug log every 5 minutes for that message and if it finds it, it restarts the SMTP service and sends me an email. I also set up a drop folder so that the dropped emails can be retried but last time I retried sending them they duplicated in people's mailboxes for some strange reason.

[cfdynamics]

It's looking like the 10.49 release did actually resolve the issue. will post here again if it comes back

[R4LRetro]

It's looking like the 10.49 release did actually resolve the issue. will post here again if it comes back

Might be too soon to ask, but are you seeing improvements? I'm going to install 10.49 tonight.

[cfdynamics]

Seems to be resolved in the 10.49 release. SMTP service has not crashed since the update and DKIM signing is working normally.

[R4LRetro]

Seems to be resolved in the 10.49 release. SMTP service has not crashed since the update and DKIM signing is working normally.

I can echo this as well. So far so good!