Hi,

I've set up postfix as mail server. and am able to receive mail from both i-net and locally.

But all my outgoing mail is not being delivered! Locally it works, I have not changed any port in postfix config-files.

I then read about my ISP maybe blocking outgoing smtp ports. I'm able to send mail to my IPS- smtp servers(my ISP mail account). It says that port 334 is open instead!

How to check the theory of blocked outgoing snmp ports? Is there a way to bypass the firewall by changing the outgoing ports locally?

Any config files would be posted at request.

Any help would be appreciated.