On 13.03.18 13:54, L.P.H. van Belle wrote:
Im reading through rfc's but the following is still not clear for me. E-mail is rejected base on the envelop-from adres from a mail-daemon with postfix + postfix-policyd-spf I saw the following in the postfix logs. Feb 7 00:00:16 hostname postfix/smtpd: Untrusted TLS connection established from smtp1.xxxxxxxx.nl[x.xx.xxx.xx]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Feb 7 00:00:16 hostname postfix/policy-spf: Policy action=PREPEND Received-SPF: none (apmcsqa01.poort: No applicable sender policy available) receiver=hostname.domain.nl; identity=mailfrom; envelope-from="MAILER-DAEMON@apmcsqa01.poort"; helo=smtp1.xxxxxxxx.nl; client-ip=x.xx.xxx.xx] Feb 7 00:00:16 hostname postfix/smtpd: NOQUEUE: reject: RCPT from smtp1.xxxxxxxx.nl[x.xx.xxx.xx]]: 450 4.1.8 <MAILER-DAEMON@apmcsqa01.poort>: Sender address rejected: Domain not found; from=<MAILER-DAEMON@apmcsqa01.poort> about this: envelope-from="MAILER-DAEMON@apmcsqa01.poort"
who and why configured non-existing domain name there?
Im looking for the correct rfc where its described that the part @apmcsqa01.poort should be @thesendingdomain.tld
RFC 5321, section 2.3.5. Domain Names: Only resolvable, fully-qualified domain names (FQDNs) are permitted when domain names are used in SMTP.
where thesendingdomain.tld is also a resolvable domain, because not it does not make sence because the now mailer-daemon wil never be accepted because its non resolveable
correct. that is the expected behaviour. do you expect someone to accept mail from non-existing (invalid) addresses? -- Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/ Warning: I wish NOT to receive e-mail advertising to this address. Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu. 10 GOTO 10 : REM (C) Bill Gates 1998, All Rights Reserved!