Personally, I would classify RBL as a totally illegal activity. Those
f*cking idiots have blocked me way too many times. So no, I won't send
you a RBL list.
This is bad and misleading advice. Just because you are listed on one
or more RBLs does not mean they are bad. Tolga, use zen.spamhaus.org
to reject at SMTP time. Also consider rejecting machines that HELO (or
EHLO) with "dynamic looking" hostnames.
Although somewhat controversial, I've had great success with exactly that.
A couple of dozen regular expressions that match things like "dynamic",
"home", numeric addresses and similar patterns in
/etc/postfix/spam_ip_regex in smtpd_client_restrictions cuts the spam
and the calls to RBLs way down:
smtpd_client_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
hash:/etc/postfix/whitelist,
regexp:/etc/postfix/spam_ip_regex,
reject_unknown_reverse_client_hostname,
reject_unauth_pipelining,
reject_non_fqdn_recipient,
reject_rbl_client zen.spamhaus.org
Terry
