-- Doug > On Oct 29, 2023, at 10:59, Matus UHLAR - fantomas via Postfix-users > <postfix-users@postfix.org> wrote: > > On 29.10.23 16:43, Robert Inder via Postfix-users wrote: >> For 10 years now I've been running a Linux (CentOS 7) server, using >> Postfix to handle mail for a handful of users. >> Specifically, I'm running Postfix 2.2, because that is the most recent >> version yum will fetch >> from the current/default set of repositories. >> >> Some users want to use GMail, so I have used an alias (in an aliases file) >> to forward their mail to their GMail account, making >> person at my.domain >> an alias for >> same_person at gmail.com >> >> Recently, users have told me they have discovered that mail has not reached >> them because it was rejected by GMail. >> >> The rejection mail I have seen says GMail rejected the message because the >> IP address of my server did not pass >> DKIM or SPF for the source of the email. > >> Can I do that with Postfix 2.2? > > not with postfix itself. > I did SRS by using postsrs, see https://github.com/roehling/postsrsd > > This way, even forwarding using ~user/.forward will get SRS'ed. > > However, any mail from foreign domains without DKIM may still get rejected.
I run a similar mail server. I use SRS and it "works" - well sort of. Most of the mail gets eventually accepted although it is delayed many hours. The delay range is about 1.5 to 27 hours. I am pretty sure that much of the long delayed mail is actually spam. I created a log scanner to find the sources for the messages that are delayed to see if there is any conistency but there are no significant differences in the number of delayed mail baed on source IP. -- Doug
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