Minimal Postfix SMTP proxy

I recently tried out the Minimal Postfix SMTP proxy, and I was impressed with its simple and effective approach to SMTP proxying. This software's main purpose is to copy an SMTP conversation between its input and another SMTP server, while spooling the DATA portion to a temporary file. The unique aspect of this program is that it runs a specified program on the spooled data before it is passed on to the output server.

If the content filter determines that the message should not be accepted, Minimal Postfix SMTP proxy outputs an SMTP error code. The program has a minimal feature set, focusing on doing one job well: proxying SMTP conversations and passing message contents to another program to determine whether to accept or reject the message.

One of the highlights of this software is its reduced complexity. Because Minimal Postfix SMTP proxy focuses solely on its main function, it reduces the risk of bugs and security holes. Postprox is small and straightforward, making it easier to navigate and understand.

Overall, I was pleased with the Minimal Postfix SMTP proxy's performance and found it to be an excellent option for those seeking a streamlined and secure SMTP proxying solution. It's important to note that this software is licensed and distributed under the terms of the Artistic License.