saslproxy

One of my critical work functions is emailing reports to users automatically. Recently work reconfigured the mail servers and now require all messages sent out to have authenticated senders via SASL. Since not all SMTP libs were upgraded with such functionality, it was easier to write a proxy to authenticate on my behalf. This script simply injects a SASL auth plain credential at the right time. I use it with stunnel for TLS.

-- This script is meant to act as a SMTP proxy for the following condition: The sender uses SMTP but does not understand how to do SASL authentication The server requires SASL authentication to send. You might have to combine this with stunnel if your server also requires TLS. If that's the case, configure this script's relay to be stunnel and then configure stunnel to connect to the actual mail server.

An stunnel config to do that would look like this: --- start --- client = yes

[securesmtp] accept = 25 connect = mail.yourserver.com:25 protocol = smtp --- end ---

You can use test.pl to send a simple mail message to double check that the proxy is working.