Brian Mathis wrote:
On Jan 18, 2008 4:11 PM, Miark mlist2@gardnerbusiness.com wrote:
Having been accomodating about it in the past, the technical geniuses at Comcast have permanently blocked port 25, separating me (at my home office) from my employer's e-mail server.
What can be done on the server side to keep Postfix listening on 25 _and_ accept my connections on some other port? Is there a Postfix solution? iptables maybe?
Miark
A "simple" solution would be to use SSH port forwarding from your system to the remote server. You'd need SSH access to another server outside of Comcast's network, like maybe one at work. Then you would use the SSH command line: ssh -L 2525:mailServer:25 -N username@remoteServer where mailServer is the DNS name or IP address of the mail server, and remoteServer is the server name you have ssh access to. Then you set your outgoing mail server to 127.0.0.1 port 2525.
The more complex solution is to set up a VPN between your office and the work office. Another option is to just use the Comcast mail server for outgoing mail, depending on your requirements.
Or activate the MSA port (587) on the Postfix server. This is used specifically for submitting outgoing mail and usually requires SMTP authentication. It should be fairly easy to configure, but I'm not familiar with Postfix, so I can't help you there.