Constant Scam e-mails

Lately I've been getting an in flux of e-mails from noreply@blizzard.com. Originally, if I got an e-mail from this address, it WAS Blizzard, and I'd open it, read it, it wouldn't ask for my password, or ask for anything for that matter, and was usually just information regarding information I'd change on my account just a few moments earlier.

Now however, I've been getting these e-mails saying something along the lines of this:


______________________________
Hello!

We are very sorry to inform you that your account occurred in the number of illegal transactions in a very long period of time. We have not received any complaints about your transactions. But if other players send complaints about your account to us, we will permanently ban your account.

So we have issued this warning letters to you. You should go to the account management website to check your account status as soon as possible(https://www.worldofwarcraft.com/account/), you can also find them here.
_______________________________


Now, even though the URL in the e-mail appears to be right, when I attempt to go to it, Opera warns me that it's a fraud, etc. And the URL isn't exactly the same as it is in the e-mail. So I know it's a fake. The only problem is, I can't trust ANY e-mail having to do with Blizzard or World of Warcraft, even though the e-mail address is blatantly Blizzard's own. Bare in mind that this has been going on for a few months now, and I have literally dozens of these e-mails.