Salutations,
I am running Postfix 3.5.23 on Debian 11 as an edge mailserver that
accepts mails on port 25 for a list of domains defined as relay_domains
in the main.cf.
I am currently trying to setup a second smtpd process on port 587 that
accepts mails only for local recipients.
I have added the following entry to the master.cf:
587 inet n - y - - smtpd
-o relay_domains=
-o content_filter=
-o
receive_override_options=no_unknown_recipient_checks,no_address_mappings,no_header_body_checks,no_milters
-o smtpd_helo_restrictions=
-o smtpd_client_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_relay_restrictions=
-o
smtpd_recipient_restrictions=permit_mynetworks,reject_unauth_destination
-o mynetworks=127.0.0.0/8
The idea is that the reject_unauth_destination will reject all mails
except for local recipients because relay_domains is empty.
Problem is mails for all the domains defined as relay_domains in the
main.cf are still accepted.
If I set relay_domains to empty in the main.cf it works as expected.
So it seems to me the '-o relay_domains=' parameter for smtpd does not
work correctly. According to the man page of smtpd however it should be
supported.
Am I overlooking something?
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