[Suggestion] Checking outgoing mail compliant

[lucadevac]

Dear,

lately we have had problems with senderscore flagging our smarthost relay (proxmox mail gateway) as bad.
We have no spam activity from this server, so I contacted senderscore and they suggested I check the quality of outgoing mails (in terms of compliant).
Since our proxmox server acts as a smarthost relay for multiple domains (we are an isp) this is not trivial, because the mail domain authentication configurations (dkim, dmarc) must be done by the client on his domain and not by us as a provider.
So I was wondering if there was a proxmox plugin on the outgoing mail queue, which checks the quality of mails in transit and provides a graph of those that are compliant or not.
Do you know if there is such a thing? any suggestion?

thanks

 

[Stoiko Ivanov]

see: https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#_filtering_outgoing_emails

you can use PMG to run your outgoing mails through the rulesystem as well (everything arriving on the internal port will be analyzed by rules with direction out (or in&out)) - just add a rule that does spam-scanning (and maybe quarantine mails that are over a threshhold, or accept them explictly - that way you get it logged)

I hope this helps!