Question Smarthost mail relay to be more granular

[Shanti]

Server operating system version

Ubuntu 22.04.5 LTS

Plesk version and microupdate number

Plesk Obsidian v18.0.66_build1800250106.19 os_Ubuntu 22.04

I very much welcome Smarthost feature in Server-wide mail settings. However, my VPS has very high mail delivery rate >99% but small number of domains use one specific black lister which operates not on one specific IP address but rather on the whole cloud provider that I use.
So for me doesn't make much sense to increase my monthly costs and move all my mail delivery to alternative provider (e.g. Mailgun) just for those problematic, say, 100 email messages a month.

With that said, for me it would be of super high value if Smarthost would be much more granular e.g.:

1. If Smarthost could be enabled on per-subscription or per-domain basis rather then just server-wide, or
2. If Smarthost is server-wide setting but it engages only for admin listed domains (FQDNs)

Does anyone know if there is any way to configure postfix to work as described above, as of now?

 

[Sebahat.hadzhi]

Hello, @Shanti . At this point, it is not possible to configure Smarthost on a per-domain/per-subscription basis. There is an existing feature request and I would like to encourage you to vote for it in case you want the functionality to be potentially introduced in the future.

 

[Kaspar]

As a side note to what Sebahat already posted, you can configure Postfix manually to use a relay server for specific domains (or mailboxes even) outside of Plesk.

This Stackoverflow article does a decent job of explaining the necessary configuration.

How do I configure Postfix to only relay emails from a specific domain?

I've already answered my own question and may later update this question to reflect on my starting point/the steps I took to get to my solution, but figured I would ask a question that I started wi...

stackoverflow.com