Until this issue I’m not aware of having touched these settings (other than removing the RBL part). It’s currently set to:
whereas the original is:
smtpd_sender_restrictions="reject_non_fqdn_sender,reject_unknown_sender_domain,reject_authenticated_sender_login_mismatch,reject_rhsbl_sender dbl.spamhaus.org" \
smtpd_recipient_restrictions=permit_sasl_authenticated,permit_mynetworks,"reject_rbl_client zen.spamhaus.org",reject_unlisted_recipient,"check_policy_service inet:127.0.0.1:10023"
There are some other differences, so I’ve restored this original config and will see how it goes.
I’m confused by the naming though - I would have expected the “sender” restrictions to apply to outbound, and the “recipient” ones to apply to inbound, but it looks like it’s the reverse, because there is no auth permission for the “sender” restrictions. Is that right?