Sendmail - use custom port for specific domains

Question

CentOS 5.x | SendMail

Hi,

I need to route email for specific domains to a custom port on a downstream server. Is there an easy way of doing this? I came across various instructions describing how to do this if I set my local sendmail listening interface to a different port but I don't want to do this.

In short, I want my local sendmail MTA to still listen on port 25 but to send mail for foo.com to MTA 123.123.123.123 on port 2525.

-M

Answer 1

use the mailertable add to your /etc/mail/mailertable

domain_name    smtp[123.123.123.123:2525]

Then run

make -C /etc/mail