Does anyone know if Jaguar has TMDA enabled on their mail servers? TMDA is a whitelist/blacklist/challenge-response system for email. I use a similar system on the Exchange server at work and it is great--pretty much eliminated all spam and I haven't had one complaint from someone asked to reply to the challenge. It has many options for controlling addresses and who is blocked, including temporary "safe" addresses.

It's a server-side application, so Jaguar would have to run it, but it would be up to each user whether it does anything to their account.

See http://www.tmda.net/

JW