We are going to implement an IP Sec policy in our domain to block outbound traffic on port 25 from all workstations. We are donig this because we recently caught a spam bot on one of our workstations that slammed outbound smtp traffic utilizing it's own smtp engine and we were black listed.
Our Outlook clients are all configured with Internet Mail profiles (POP 3) and obviously need to send mail which by default smtp mail is sent on port 25
I woulid like to reconfigure the Outlook clients to send on a different port, let's say port 830 and then have the traffic sent to the PIX 501 on port 830 translated to port 25 so that it may reach the mail relay server. I'm not sure if this is possible or even the right route to take.
Any ideas would be greatly appreciated.