Hello, in Postfix v3.1 I'm having a hard time getting
reject_unknown_client_hostname to bounce test messages.
I set an external host's Postfix myhostname to be purposefully
incorrect, like nosuchhost.example.com and sent a message to the test
system. If I have reject_unknown_helo_hostname enabled, it will reject
such messages. But reject_unknown_client_hostname won't, I don't
understand why.
smtpd_helo_required = yes
smtpd_helo_restrictions =
reject_invalid_helo_hostname
reject_non_fqdn_helo_hostname
reject_unknown_helo_hostname
smtpd_client_restrictions =
reject_unauth_pipelining
reject_unknown_client_hostname
smtpd_sender_restrictions =
reject_non_fqdn_sender
reject_unknown_sender_domain
smtpd_relay_restrictions =
permit_mynetworks
permit_sasl_authenticated
reject_unauth_destination
smtpd_recipient_restrictions =
reject_non_fqdn_recipient
reject_unknown_recipient_domain
permit_sasl_authenticated
