Hi I'm trying to set-up Postfix on my firewall, as recommended by Postfix. http://www.postfix.org/faq.html#firewall This is my configuration that works. /etc/postfix/main.cf relay_domains = $mydomain mydestination = $myhostname, localhost.$mydomain, transport_maps = hash:/etc/postfix/transport relayhost = [192.168.1.3] This is what they recomend <Quote> Specify a null relay_domains parameter plus a transport table to route mail for my.domain to the inside machine: /etc/postfix/main.cf: mydestination = $myhostname, my.domain, localhost.my.domain relay_domains = transport_maps = hash:/etc/postfix/transport /etc/postfix/transport: my.domain smtp:inside-gateway.my.domain (forwards user@domain) .my.domain smtp:inside-gateway.my.domain (forwards user@firewall) /etc/postfix/master.cf: Comment out the local delivery agent </Quote> If I understand this correctly you should do the following please correct me if I'm wrong. /etc/postfix/main.cf: mydestination = $myhostname, localhost.$mydomain, $mydomain, relay_domains = transport_maps = hash:/etc/postfix/transport /etc/postfix/transport: $mydomain smtp:[192.168.1.3] .$mydomain smtp:[192.168.1.3] /etc/postfix/master.cf: #local But when I set this up it does not seem to work. All tips wellcome. Thanks in Advance Steven