sender_dependent_default_transport_maps difficulties

[Russell Jones]

Hi all, I am having a very difficult time getting sender_dependent_default_transport_maps to actually work as described. I have a simple postfix 2.9.3 server with 2 IP addresses. I want all mail sent from a sender address of *@example1 to go through 1.1.1.1, and all mail sent from a sender address of *@example2.com to go through 1.1.1.2. My master.cf currently looks similar to the following: 1.1.1.1:smtp     inet    n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_key_file=/etc/postfix/server.key -o smtpd_tls_cert_file=/etc/postfix/server.crt -o myhostname=mail.domain1.com 1.1.1.1:submission inet n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_key_file=/etc/postfix/server.key -o smtpd_tls_cert_file=/etc/postfix/server.crt -o myhostname=mail.domain1.com 1.1.1.2:smtp     inet    n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_key_file=/etc/postfix/mail_domain2_com.key -o smtpd_tls_cert_file=/etc/postfix/mail_domain2_com.crt -o myhostname=mail.domain2.com 1.1.1.2:submission inet n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_key_file=/etc/postfix/mail_domain2_com.key -o smtpd_tls_cert_file=/etc/postfix/mail_domain2_com.crt -o myhostname=mail.domain2.com 127.0.0.1:smtp     inet    n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_key_file=/etc/postfix/server.key -o smtpd_tls_cert_file=/etc/postfix/server.crt 127.0.0.1:submission inet n       -       n       -       -       smtpd -o smtpd_sasl_auth_enable=yes -o smtpd_tls_key_file=/etc/postfix/server.key -o smtpd_tls_cert_file=/etc/postfix/server.crt I tried the following setup in /etc/postfix/sender_dependent_default_transport_maps with no luck : /@domain2\.com$/      1.1.1.2:smtp: I have the following in /etc/postfix/main.cf: sender_dependent_default_transport_maps = regexp:/etc/postfix/sender_dependent_default_transport_maps It gives the following error: dsn=4.3.0, status=deferred (mail transport unavailable) What is the simplest way of doing this? I've tried both regexp and a standard hash format as described on various pages I have Googled with no luck. Thanks in advance!