We're an anti-spam company that combines a few tools for users:
whitelist/blacklist, some social-networking leveraging, spam filtering,
customization options, in-place IMAP filtering, integration with
Yahoo/GMail/domains hosted by Google Apps, etc. We do SPF checking on
all identities present in all relevant messages, and combine that with
DK/DKIM checks and a lot of other factors to decide how to handle
messages for our users. JSPF definitely gets a workout on our servers
(Tomcat)!
As I'm interested in working on a java DKIM implementation sooner or
later, may I ask what implementation are you using for DKIM?
We use Mail::DKIM in conjunction with a simple custom
Net::Server::PreFork server and custom Java-side client...
It works great, but we would love a jDKIM. :-) We were planning to
release our Perl-Java server-client setup as open source, since there
was no Java solution for DK or DKIM.
Furthermore, are you using the "synchronous" or the "asynchronous"
resolver in jSPF? (the default is synchronous)
I was the DKIM guy, not the SPF guy, but judging by the code, we're
using the defaults. We handle lookup latency with multithreading.
-Casey
