In my mail log, I sometimes get an error on what appears to be random = email deliveries to my mail servers (im sure there is a pattern somewhere). = The error is : ' unknown smtpd restriction: "a" ' . After this error = occurs, I get a "451 Server configuration error". =20
How do I locates this unknown smtpd restriction? Here is the relevant = part of my main.cf file: smtpd_recipient_restrictions =3D reject_unauth_pipelining, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_recipient_domain, hash:/etc/postfix/to_recipients_bw.map, reject_unknown_sender_domain, permit_mynetworks, reject_unauth_destination, check_client_access hash:/etc/postfix/mta_clients_bw.map, check_sender_access regexp:/etc/postfix/from_senders.regexp, 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_slet.map, check_sender_access hash:/etc/postfix/from_senders_mybogus.map, reject_rbl_client blackholes.wirehub.net, reject_rbl_client relays.ordb.org, reject_rbl_client proxies.relays.monkeys.com, reject_rbl_client spamhaus.relays.osirusoft.com, reject_rbl_client socks.relays.osirusoft.com, reject_rbl_client inputs.relays.osirusoft.com, reject_rbl_client bl.spamcop.net, permit
