On 3/21/23 02:05, Jeff Berry wrote:
The problem we're having is that if the mailman domain of the list is listserver.domain.com then spamfilters start to flag the mail since it looks like spoofing/malformed headers and so on. If the mailman domain is just domain.com then postfix rejects it with an unknown local recipient error. I though I might be able to just tweak the incoming mail headers in postfix via header_checks but that's not working, either because I've got the wrong check or it's the wrong approach, or both.
postfix relay_domains might do it, I think, but if it maps listserver.domain.com to domain.com that would break the listserver domain mailing lists (I think).
Is Postfix on the mailman server set up per
https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/docs/mta.ht...
and did you run mailman aliases to regenerate mappings after changing
Exchange to relay to list@domain.com?
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan