For the first time in ages, we just got a call from someone who cannot send
us email. His emails keep getting rejected by our IMGate. Did a grep for
[EMAIL PROTECTED] and found three entries in my log:
...554 Client host rejected: cannot find your hostname, [65.54.247.110];
All 3 ips have no reverse DNS.
(I also checked the logs for the past 3 days, and this is the first valid
hotmail.com user! All the rest were zombies and spam!)
Other than adding the ips to mta_clients_bw.map, what can I do to let valid
hotmail servers through?
>From my main.cf:
smtpd_recipient_restrictions =
reject_unauth_pipelining,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_recipient_domain,
permit_mynetworks,
hash:/etc/postfix/to_recipients_bw.map,
reject_unauth_destination,
check_client_access hash:/etc/postfix/mta_clients_bw.map,
reject_unknown_sender_domain,
check_sender_access hash:/etc/postfix/from_senders_bw.map,
check_helo_access hash:/etc/postfix/helo_hostnames.map,
check_sender_access hash:/etc/postfix/from_senders_clueless.map,
check_sender_access hash:/etc/postfix/from_senders_bogus.map,
check_sender_access hash:/etc/postfix/from_senders_mybogus.map,
reject_rbl_client cbl.abuseat.org,
reject_rbl_client dnsbl.njabl.org,
reject_rbl_client relays.ordb.org,
reject_rbl_client dynablock.wirehub.net,
reject_rbl_client sbl.spamhaus.org,
reject_rbl_client opm.blitzed.org,
check_sender_access hash:/tmp/from_senders_slet.map,
reject_unverified_sender,
permit
