[pfx] Re: Disabling MUA submission for smtpd on port 25
John Fawcett via Postfix-users <[email protected]>
| Newsgroups | gmane.mail.postfix.user |
|---|---|
| Message-ID | <[email protected]> |
On 28/03/2026 14:14, Jim Seymour via Postfix-users wrote: > On Fri, 27 Mar 2026 01:55:38 +1100 > Viktor Dukhovni via Postfix-users <[email protected]> wrote: > > [snip] >> The simplest thing is often to just block >> port 25 messages with an envelope sender in your domains, the SASL >> does not actually come into it. >> >> smtpd_sender_restrictions = >> check_sender_access inline:{ >> { example.com = reject }, >> { example.net = reject }, >> { example.org = reject } >> } >> >> Applies equally to all clients, whether MTAs or MUAs. > You write "block port 25 messages," but does the above rule not apply > to *all* incoming connections, incl. submission and smtps (587 and > 465, respectively)? > > Regards, > Jim Not necessarily. For example I have a different set of restrictions for submission. From master.cf submission inet n - n - - smtpd ... -o smtpd_etrn_restrictions=reject -o smtpd_helo_restrictions= -o smtpd_client_restrictions=submission_client_checks -o smtpd_sender_restrictions=submission_sender_checks -o smtpd_recipient_restrictions=submission_recipient_checks -o smtpd_relay_restrictions=submission_relay_checks ... John _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]