#4 - Nov. 2, 2010, 12:55 p.m.
There was a very recent email on this and newsletter@email.blizzard.com is our newsletter address.
Providing it's our email (double check your internal routing headers), that one is legit.
Remember, that's ALWAYS a good practice and the phishers will take our otherwise legitimate emails and doctor links to go to fake sites.
Always, always check your internal headers to see who sent a mail :)