smtp.proxy - SMTP Proxy Server
smtp.proxy is an application level gateway for SMTP. It connects a client to a server running on another machine watching that the protocol is accomplished. If commands outside the specification are sent, they are not forwarded to the server.
Additionaly smtp.proxy offers a small email address control (only email with a certain sender or recipient address can pass through) and can optionally remove the `Received:' lines from the mail header.
Instead of forwarding the connection to a remote server, smtp.proxy can feed it into a local mail server, e.g. sendmail, qmail or anything else that speaks SMTP on stdin/out.
Since the latest offical release (1.3.3 in 2004) support for
- configuration files,
- interface specific configurations,
- clamav virus scanning,
- spamassassin spam detection, and
- DNS blacklisting
were added. But there is a more complete feature list online.
The current version of smtp.proxy is 2.0.0-beta16, get it in the download directory. You may also look for a current debian etch packages. I'm not a debian guru, so use with care. If you find mistakes or suggestions, please let me know.