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)
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>
Im looking for the correct rfc where its described that the part
@apmcsqa01.poort should be @thesendingdomain.tld
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
If some can point me to the correct rfc. ( and chapter ) that would be great.