Wietse Venema:
> post...@ptld.com:
> > If i send mail to submission:587 addressed to another user on the same
> > server, postfix instead of sending the mail to the mx records for that
> > domain, and connecting to postfix on smtp:25 it bypasses all of that and
> > delivers directly into that users inbox. This avoids all of my
> > filtering, smtpd_helo_restrictions, smtpd_recipient_restrictions, ban
> > list, etc.
> >
> > I am hoping for an answer that works in both of these situations. I have
> > two setups, one where everything is self contained on one server with
> > dovecot and postfix.
> >
> > On my second setup i have postfix smtp:25 on one server, and dovecot
> > imap:143 with postfix submission:587 together on another server. I want
> > when someone sends an email from their client to the submission server,
> > the submission server would connect to the smtp:25 server to deliver the
> > mail. But the submission:587 server directly delivered to the user's
> > folder and bypassed the smtp:25 server.
> >
> > How can i avoid this behavior and make postfix deliver the mail to "the
> > front door" smtp:25 even if its a user on the same system?
>
> Remove the recipient domain from main.cf:mydestination and
> main.cf:virtual_mailbox_domains.
>
> Add the recipient domain to main.cf:relay_domains.
Actually, here is a simpler one, that uses content_filter.
master.cf:
submission .. .. .. .. smtpd
-o { content_filter = smtp:[mxhost.example.com] }
-o { smtpd_recipient_restrictions = permit_sasl_authenticated, reject }
-o smtpd_relay_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_client_restrictions=
