Countries filter swiftly slices out obvious spam; optional challenge/response works (but not everyone likes it); training is unnecessary; works with most e-mail clients.
Difficult to set up; reverse-DNS filters not completely effective; no IMAP support.
I favor spam utilities that work within my e-mail client and EmailCRX doesn’t do that. It does offer a variety of ways to filter your e-mail but lacks a statistical learning filter, which could help improve its results. I’m not keen on ch...
