Halo, I have question about rejection.
Some unknown hostnames get 4.x.x defer, others get 5xx, I would like all blocks at 5.x.x, yes, I know consequences of this, I run mail servers (sendmail) for 15 years, now we move to postfix for mysql management of company email I have problem replicate sendmail settings Relevant sections of postconf -n: smtpd_sender_restrictions = check_recipient_access hash:/etc/postfix/access.never_to smtpd_recipient_restrictions = reject_unknown_sender_domain reject_unknown_recipient_domain permit_mynetworks permit_sasl_authenticated reject_unauth_destination check_recipient_access hash:/etc/postfix/access.to check_sender_access hash:/etc/postfix/access.froms check_client_access hash:/etc/postfix/access.hosts reject_unknown_client_hostname reject_unknown_helo_hostname reject_invalid_helo_hostname reject_non_fqdn_helo_hostname reject_non_fqdn_sender reject_non_fqdn_recipient reject_unlisted_recipient reject_unlisted_sender reject_rbl_client cbl.abuseat.org reject_rbl_client dnsbl.sorbs.net reject_rbl_client bl.spamcop.net reject_rbl_client dnsbl.ahbl.org check_policy_service unix:private/spfpolicy soft_bounce = no unknown_address_reject_code = 550 unknown_client_reject_code = 550 unknown_hostname_reject_code = 550 unknown_local_recipient_reject_code = 550 unverified_sender_reject_code = 550 Now we see many of: NOQUEUE: reject: RCPT from unknown[202.150.184.185]: 550 5.7.1 Client host rejected: cannot find your hostname, [202.150.184.185]; from=< cornmeal...@rehau.com> to=<deletet...@removed> proto=ESMTP helo=<FFVYYQO> But.. then I also see many of: NOQUEUE: reject: RCPT from unknown[194.xx.xx.xx]: 450 4.7.1 Client host rejected: cannot find your hostname, [194.xx.xx.xx]; from=<n...@valid-domain> to=<remo...@removedt> proto=ESMTP helo=<valid-domain-removed> In 4.x.x above me, the sender are known to us, his hostname presented exist, but no PTR RR (he is get fixed but take time), it is we prefer to 5xx, so he and others like him not wait 5 days to find mail never went, I was think unknown_client_reject_code = 550 would be this solve, but not? Anyway to have this so? My Thaks
