> Is it possible to use reject_unknown_reverse_client_hostname-like > feature as part of scoring with blacklist checking? I think > policyd-weight supported that. I consider using postfwd.
Yes this is possible with postfwd. The policy delegation protocol
contains reverse_client_name and client_name, which can be used within
postfwd rulesets.
Example:
id=COMBO01
reverse_client_name==unknown
rbl=bl.spamcop.net,pbl.spamhaus.org
action=REJECT due to no valid rDNS and blacklisting
