I've been a happy user of SpamAssassin for a little more than 3 years now. Once the wildcard whitelists were dialed in, its been nearly perfect... until a couple months ago, when I joined a project team that's fond of sending lots of mail with large attachments. I know, I know... they should be scolded, but these are the same people with 15 line .signatures. Ettiquette means nothing.
Once these regular large attachments started rolling in, my machine would get pummeled- and its usually idle, so we're talking lots of work here. Problem is, I implemented it as a perl script that gets spun up on each new incoming email. Its usually so quick to complete, its never been an issue, but now its trying to grok these large attachments and choking (it shouldn't be scanning for viruses, so I'm not sure what it would be looking for...)
During the Christmas break, I thought I'd research any new options. One promising up-and-comer is ASSP. If I were running an ISP, this 2 year old GNU licensed project would get a second look. But I'm just running a single mailserver on my desktop. And I'm still heavily in the SpamAssassin camp, as are many others in these recent years (its now an Apache project and winner of a 2003 OSDir open source award.
Looks like I'll be upgrading to the 3.x release, perhaps running in daemon mode to help with performance...
