On Fri, 10 Jan 2020 at 13:39, Matus UHLAR - fantomas <uh...@fantomas.sk> wrote:
>
> On 10.01.20 12:42, Simon B wrote:
> >For as long as I can I remember, I have blocked connections purporting
> >to be my own domain/IP address using a postmapped file called
> >helo_checks.
> >
> >This is checked AFTER permit_sasl_authenticated.
> >
> >smtpd_recipient_restrictions =
> >reject_non_fqdn_sender,
> >reject_non_fqdn_recipient,
> >permit_sasl_authenticated,
> >reject_sender_login_mismatch,
> >rejected_authenticated_sender_login_mismatch,
> >check_helo_access hash:/etc/postfix/helo_checks,
> >.
> >.
> >.
> >permit_mynetworks,
> >reject_unauth_destination,
> >a bunch more RBLs,
> >permit
> >
> >Since upgrading to 2.11 yesterday (yes, I am on a path to move up
> >through debian versions), all mail coming in on
> >postfix/submission/smtpd is being rejected by the domain check in that
> >file, even though the user is sasl authenticated.
> >
> >Can someone help me figure out why?
> >
> >I can probably remove/comment the offending line and rely on other
> >rejection parameters, but it still rejects a significant of spam
> >attempts, so I'd prefer to keep it.
>
> logs?

Quite difficult to get logs off the production environment onto my
office client, hence the redacted smtpd_recipient_restrictions

Jan 10 13:42:22 mail postfix/smtpd[18730] : NOQUEUE: rejectRCPT from
localhost [127.0.0.1]: 550 5.7.1. <mail.example.net>: Helo command
rejected: Your server is misconfigured as you are not a member of this
domain; from=<si...@example.net> to=<si...@example.com> proto=ESMTP
helo=<mail.example.net>

> don't you have check_helo_access at different place in any chance?

Good shout.  it is also in smtpd_relay_restrictions, but that is
functionally a one-to-one copy of smtpd_recipient_restrictions

> I'm not sure what smtpd_relay_restrictions debian adds to main.cf by
> default.

nothing in my main.cf is default by debian.  It's been painstakingly
constructed over hears with contributions from this list.

Thanks

Simon

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