You may want to check out the Shibboleth Project ( http;//www.interhack.net/projects/shibboleth/ ). It's a listserv type system that focuses on privacy and security. Matt has the code, but hasn't officially released it since there are still some feature bugs. However, it does have full PGP support for encryption and digital sig's. Of course, that makes overhead on the host processor daunting. Check out the paper there, and if you're interested you can shoot him email. Rachel Willmer writes:
This might be a FAQ. Or it might just be a question with a really obvious answer that I can't see for looking.
How can I set up a mailing list or online forum with encrypted traffic?
The clients are varied platforms: Win98, WinNT, OpenBSD, FreeBSD.
I thought about tweaking the listserver to send out encrypted mails. But that doesn't help the inbound traffic.
I thought about using some online forum. But the only one I can find which looks to make any mention of the word security is Groove. Which is Windows only.
I thought about setting up a VPN between the various mailservers. But we'd have to secure all the MX hosts to be sure, and some of them aren't adminstratively accessible by me. and anyway one of the potential users uses a public ISP,
so um, help! is this a FAQ with no answer? or is this a question with an answer so obvious I'll blush when I'm told what it is...
All suggestions welcome... Rachel