I‘ve configured RBL for my postfix based mail server and I’m getting an error that read as follows:
May 3 04:35:37 mx02 postfix/smtpd: NOQUEUE: reject: RCPT from ant251.neoplus.adsl.tpnet.pl[18.104.22.168]: 554 5.7.1 Service unavailable; Client host [22.214.171.124] blocked using xen.spamhaus.org; SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX; from=
to= proto=ESMTP helo=
How do I fix this problem?
I can send and receive mail using email@example.com, but system generated emails such as firstname.lastname@example.org bounce backup with an error:
May 1 03:14:52 mail postfix/smtp: 23CA4BD6B40: to=
, relay=none, delay=0.01, delays=0/0/0/0, dsn=5.4.6, status=bounced (mail for mail.example.com loops back to myself)
How do I fix this error?