Hi
I posted this message on Baruwa and Postfix mailing list since I don't know where the problem is Postfix is set to use a relayhost and a mysql based transport map for some domain that are not hosted on the same server /etc/postfix/main.cf: transport_maps = mysql:/etc/postfix/mysql-transports.cf relayhost = 10.0.1.11 /etc/postfix/mysql-transport.cf: #mysql-transports user = baruwa password = ****** dbname = baruwa query = select concat('smtp:[', mail_hosts.address, ']', ':', port) 'transport' from mail_hosts, user_addresses where user_addresses.address = '%s' AND user_addresses.id = mail_hosts.useraddress_id; hosts = 127.0.0.1 I have two domains in the transport map. Postfix is "sometime" ignoring the transport map for ONE domain and send emails through the default relayhost. Most of the emails received for this domain go through the right server. I'd say 80% are OK. Look at the mail.log entry for a mail that is sent through the wrong server. Jun 11 16:56:14 mx01 postfix/smtpd[855]: connect from rfmnotes.fossnational.com[66.212.175.2] Jun 11 16:56:15 mx01 postfix/smtpd[855]: NOQUEUE: reject: RCPT from rfmnotes.fossnational.com[66.212.175.2]: 550 5.1.1 < recipient @domain.ca>: Recipient address rejected: undeliverable address: host 10.0.1.11[10.0.1.11] said: 550 not local host domain.ca, not a gateway (in reply to RCPT TO command); from=<sen...@anotherdomain.com> to=<recipi...@domain.ca> proto=ESMTP helo=<rfmnotes.fossnational.com> ***IT SEND THROUGH THE WRONG SERVER (10.0.1.11) *** Jun 11 16:56:15 mx01 postfix/cleanup[662]: 2093E56006D: message-id=<20120611205615.2093e560...@mx01.reference.qc.ca> Jun 11 16:56:15 mx01 postfix/qmgr[28563]: 2093E56006D: from=<double-bou...@reference.qc.ca>, size=246, nrcpt=1 (queue active) Jun 11 16:56:15 mx01 postfix/smtp[800]: 2093E56006D: to=<recipi...@domain.ca>, relay=192.168.100.9[192.168.100.9]:25, delay=0.01, delays=0/0/0/0, dsn=2.1.5, status=deliverable (250 2.1.5 Recipient <recipi...@domain.ca> ok (local)) ***IT CHECK RECIPIENT VALIDITY WITH THE RIGHT SERVER (192.168.100.9) (reject_unverified_recipient in main.cf) *** Jun 11 16:56:15 mx01 postfix/qmgr[28563]: 2093E56006D: removed Jun 11 16:56:15 mx01 postfix/smtpd[855]: disconnect from rfmnotes.fossnational.com[66.212.175.2] I tried to set a text transport map and postmap'd it instead of mysql and I get the same issue. Any help is greatly appreciated Max