A quick check of the internet tells me that others have received this email Over the weekend.
Hi,
You’ve successfully changed your password.
If you didn't make this change, please call us on 0330 102 8005.
Thanks,
The AA Team
[email protected]
The email address is a genuine AA address (or appears to be) and the number's certainly a genuine AA number.
The AA are currently saying it's a fake email, but it's more likely that either they've been hacked or that the emails are the result of a mistake.