Dear Users, we have the following in place:
smtpd_recipient_restrictions = reject_unknown_recipient_domain, reject_unverified_recipient unverified_recipient_reject_code = 550 unknown_address_reject_code = 550 today, we had an issue with our groupware so the following was happening: NOQUEUE: reject: RCPT from unknown[ip]: 450 4.1.1 <adm...@domain.tld>: Recipient address rejected: unverified address: Address verification in progress; from=<m...@intmon01.int.domain.tld> to=<adm...@domain.tld> proto=ESMTP helo=<intmai01.int.domain.tld> Oct 11 17:19:13 kop01 postfix/lmtp[5711]: E759E301412: to=<adm...@domain.tld>, relay=127.0.0.1[127.0.0.1]:2003, delay=13, delays=0/0.01/13/0, dsn=4.0.0, status=undeliverable (host 127.0.0.1[127.0.0.1] refused to talk to me: 421 internal error: OpenResolveAddrFolder failed) NOQUEUE: reject: RCPT from jir01.int.domain.tld[ip2]: 450 4.1.1 <demo.u...@domain.tld>: Recipient address rejected: unverified address: host 127.0.0.1[127.0.0.1] refused to talk to me: 421 internal error: GetSession failed; from=<j...@domain.tld> to=<demo.u...@domain.tld> proto=ESMTP helo=<jir01.int.domain.tld> How do we reject unknown destinations / recipients still with a perm. error, but be more robust against temp errors like the ones above?
