A customer of ours has said that someone at a domain (shaw.ca) is emailing her and we are blocking it. So I do some digging and sure enough:
Jan 14 08:19:55 gumby postfix/smtpd[24503]: reject: RCPT from shawidc-mo1.cg.shawcable.net[24.71.223.10]: 504 <snelsong@shaw>: Sender address rejected: need fully-qualified address; from=<snelsong@shaw> to=<[EMAIL PROTECTED]> Postfix is blocking on reject_non_fqdn_sender. How can I whitelist this? She says everyone else can get this persons email, including msn.com accounts. So I test it out, telnet to mx for msn.com and do a mail from:<kwoody@citytel> and get a 250 response. Fine. I guess I can just tell them to fix the reply to on their MUA to properly reflect their email address would be the smart thing. I'd rather not pull out that check as Ive had it there for ages and never had a complaint before. Does anyone else use this check? smtpd_recipient_restrictions = reject_unauth_pipelining, check_client_access hash:/etc/postfix/from_senders.map, <<<<< would putting the above check in solve this issue? reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_mynetworks, reject_unauth_destination, check_client_access hash:/etc/postfix/access, check_sender_access hash:/etc/postfix/access, check_helo_access hash:/etc/postfix/helo_hostnames.map, reject_non_fqdn_hostname, check_sender_access hash:/etc/postfix/spamlist_extended.map, check_sender_access hash:/etc/postfix/from_senders_bogus.map,
