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 unblocked proxies 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.