DNSBL for email addresses?

[Marc Perkel]

Are there any DNSBLs out there based on email addresses? Since you can't 
use an @ in a DNS lookup - how would you do DNSBL on email addresses? Is 
there a standard?

--
Marc Perkel - Sales/Support
supp...@junkemailfilter.com
http://www.junkemailfilter.com
Junk Email Filter dot com
415-992-3400