DKIM signing not applied to out-of-office mails

[bcnx]

Hi,

We use PMG as a relay for outgoing mail. I noticed that out-of-office auto replies end up in spam folders and when looking at the headers, no DKIM signing is being done. Regular mails do have the DKIM headers. The sender domain is the same as the one configured in the Mail Proxy configuration. The only difference I can observe is in the Message-ID header, which has the fully qualified name of the e-mail server instead of the domain.

What could be the reason the out-of-office auto replies do not get treated for DKIM?

Thanks,

BC

 

[Stoiko Ivanov]

My guess is that the mails get sent with an empty envelope sender - those currently do not get signed by PMG - see:
https://bugzilla.proxmox.com/show_bug.cgi?id=2971

you can verify this with the logs of such a mail.

I hope this helps!

 

[bcnx]

Hi, thanks - yes, I found this explanation also in https://forum.proxmox.com/threads/a...igned-dkim-by-proxmox-outbound-gateway.94317/

That's unfortunate, as there is then no solution in PMG itself. What I'm doing now is implementing DKIM on the Postifx instance of my e-mail server.

Cheers,

BC