Blizzard's email address?

Various addresses depending on the department, but it will typically end in @blizzard.com.

***Edited for Accuracy***

There are a few mails that will come from other addresses, typically informative e-mails that have little to do with support.

05/29/2011 04:29 AMPosted by Ljyieguwlahs

From what email address does Blizzard send its email from?

While paying close attention to the sender of an e-mail is important, and a good habit to have, it is not enough to keep ahead of phishing e-mails, Ljyieguwlahs. E-mail addresses can be (and are) spoofed to make it look official. If you are looking to improve your knowledge of how to stay ahead of the game, I would check out the following Support Article:

How to Identify Fake or Phishing Emails:
http://us.blizzard.com/support/article/25133