--On Wednesday, August 31, 2011 5:48 PM -0400 Mailing Lists <mailinglist at theflux.net> wrote: > http://www.openspf.org/Introduction - SPF FTW DKIM is another possibility. Blizzard (the game company) signs some (not all) of its mail with DKIM, and I use that to spot obvious account-theft scams. Unfortunately some servers break the signature, so it can be difficult to use and verify. <http://en.wikipedia.org/wiki/DomainKeys_Identified_Mail>