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[22.214.171.124]: 554 5.7.1 Service unavailable; Client host [126.96.36.199] blocked using xen.spamhaus.org; SPAMHAUS BLOCKLIST ADDRESS IS WRONG MUST FIX; from=
to= proto=ESMTP helo=
How do I fix this problem?
[click to continue…]