Rspamd 1.2: Fast, free and open-source spam filtering system (opens in new tab)

I've started using this a few months ago on my mail server that mostly just forwards stuff to GMail, and it's been really good. It catches (and rejects) most of the bad stuff before it even ends up in GMail's filters and, more importantly, this means my forwarding server doesn't get rate-limited anymore by GMail for sending so much spam.

I've been packaging rspamd for Gentoo, and it's pretty straightforward to build and run (more so now if you run Gentoo, of course), so that's good too.

Anyone using this in a large environment care to comment on how it compares to SpamAssassin, especially with regard to per-user settings and false negatives/false positives?

The code is really refreshing, not surprising since the author is a BSD developer :)

This looks really solid. I know one of the big methods to work around something like this is to change the destination of included links after successful delivery.

Does this provide a way to replace links in a message so that they can be evaluated on click for continuous protection? Optionally of course since this would be more of a company policy type of protection than anything else.

The level of documentation for this project is super-impressive, especially since it seems to be mainly a one-man effort. Great job on this, congrats!

(Apologies in advance to other contributors if I was incorrectly discounting their efforts; I made an assumption based on the number of commits on the repo.)