CentOS 5.x | SendMail
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 18.104.22.168 on port 2525.