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FreeBSDZine.org: SMTP over an SSH Tunnel

May 20, 2001, 23:59 (0 Talkback[s])
(Other stories by Jim Mock)

The author of this quick tutorial was faced with the need for a secure mail relay that would get him around Earthlink's poor status with many of the more agressive spam blockers. His solution was creating a secure tunnel for SMTP from his laptop at home to a mail server that didn't enjoy outlaw status.

An easy way to do so would have been to allow relay for earthlink.net through the machine I was going to use as my relay. This would have been bad, and as a result was an unacceptable option. You'd have to be a serious cracksmoker to open up a machine to relay for Earthlink. Spammers would sniff it out fairly quickly, and proceed to hammer it. To get around this, I decided to set up an SSH tunnel from a port on my laptop to port 25 on the mail server. It was a fairly easy task, and well worth it in the long run. The remainder of this article will explain how I set things up.

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