How to Change the port that mail is sent out on.

[dargx001]

I have found that my ISP blocks port 25, which I need to be able to send email out of my server with. Is there any way around this? My server is running Fedora 8 with postfix. I've checked my config files and everything appears alright.

[Freston]

It may be against your ISP's policy if you send mail via your own server, even if you do change the port.


Even as such, you can configure your outgoing port, but the other side needs to know also that you're using a different port. It's never:

Client - - - > Server
port:25 - - > port:25

But rather:

Source - - - - - - - - > Destination
port:$RANDOM - - > port:25

See? Part of the problem is on the other side.