Let's say I have 2 machines in my network (sitting behind a firewall):
1. An email server (serves firstname.lastname@example.org
2. A SLES (SuSE Linux Enterprise server) server.
I have an application running on the SLES that sends email. The app uses postfix master to send email.
Currently, if my app sends an email to email@example.com
, the mail is successfully delivered via the email server.
However, if my app sends an email to firstname.lastname@example.org
, postfix/smtp complains that the mail.yahoo.com is unreachable. I have opened up the firewall so that my SLES server can send email out to the outside world on port 25.
Does anybody know I can configure postfix master so that *ALL* email is sent (or relayed) via my email server?
Thanks in advance.