Viktor Petersson.com
Posts Tagged ‘SMTP’
In this article, I will walk you through the process of setting up ASSP. If you’ve never heard of ASSP, it is a great anti-virus and spam-fighting proxy that sits in front of your SMTP server. Under the hood, ASSP includes a lot of intelligent spam logic, but you won’t really have to worry about it. All you really need to know is that it great at fighting spam and that it is easy to set up.
In this article I assume that you already got Postfix in place, but you can use ASSP with any other SMTP server, as it simply sits as a proxy between the user and the SMTP server. In essence, what you need to do is to re-bind your SMTP server to another port (eg. 125) or IP (eg. 127.0.0.1) and have ASSP listen on the public interface and relay the messages to your SMTP server.
Let’s get started.
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I just published a guide on how to troubleshoot email over at Email Service Guide. It’s fairly straight forward, but does require a bit of technical skills.
The reason why I wrote the guide was actually because I quite frequently found myself Googling for a good IMAP cheat sheet (the RFC is not very good for this). Once I started writing, I realized that it wouldn’t take a whole lot more effort to include POP3 and SMTP as well (since the technique is the same). So I included them too.