| SYSTEM INFORMATION | |
|---|---|
| OS type and version | Centos 7.9.2009 |
| Virtualmin version | 7.20.1 |
First, I’m in the very beginning stages of migrating my server to probably AlmaLinux, so forgive my old setup. I’m also generally a novice but have many years of novice experience, if that makes sense. I can get around Linux with decent instruction.
I run a Mailman list on my server with several dozen friends. It works fine most of the time, though because of header issues there can be some hiccups.
What seems to be the problem is any email I send to myself doesn’t seem to get fully evaluated by Postfix, so the headers are missing important items like DKIM. I’m emailing using Thunderbird/SMTP, authenticating directly with my mail server/domain.
So when I send an email to my Mailman mailing list, the same thing happens, so the headers have no DKIM, and any users with a Gmail address don’t get the emails for an extended period due to rate limiting etc by Gmail. It seems it’s not that Mailman is removing the headers, rather Postfix just isn’t inserting them.
Oh, for email sent outside my server, headers are working. SPF, DKIM and DMARC all check out as functional when tested.
I need to get those headers into emails to myself(& mailing lists). Can someone tell me where to look and what to check/change to force headers on these “internal” emails? Thank you.