I recently kind of gave up and just relied on the Thunderbird spam filter, in addition to my handcrafted rules.
Now there are already thousands of files in my junk mail folder. It is infeasible to check them by hand, so I'll never learn about any false positives. In other words, email is not a reliable way to reach me anymore :-(
i was using a greylisting approach which filtered a lot of spam, but was annoying for customers who had to wait an hour to receive an initial e-mail from a new contact.
i've since switched back to postini. i haven't seen any changes on way or the other since their google acquisition, but their filtering is very accurate and they offer a webmail-like interface for checking/forwarding spam and adjusting settings.
I recently kind of gave up and just relied on the Thunderbird spam filter, in addition to my handcrafted rules.
Now there are already thousands of files in my junk mail folder. It is infeasible to check them by hand, so I'll never learn about any false positives. In other words, email is not a reliable way to reach me anymore :-(