I received an email, on the email account I have associated with ESO, putatively containing an ESO "Morrowind" closed beta "invitation".
The subject line is "Elder Scrolls Online - Code Redemption", the preamble reads "You've successfully redeemed a code for The Elder Scrolls® Online. We're applying it to your account now! Your receipt and further details can be found below." and the email in general contains instructions on how to access the PTS and etc, as well as a "code" (20 alphanumeric characters, clearly labelled "code").
Suspicious of phishing, I have scrupulously traversed none of the links contained in the email (though inspecting the HTML, they appear to be valid, which would be strange for a phishing attempt).
Attempting to redeem the "code" from the email via my account settings at account.elderscrollsonline.com has no effect ("Invalid Code" error message). Following the instructions for installing the PTS client via the legitimate launcher, and launching the PTS client, all appear to be correct. The apparently legitimate PTS client permits me to log into the PTS using my regular ESO account/password. After several screens worth of disclaimers, etc, I am prompted for a code. Entering the "code" from the email via this prompt results in an error message "Your previous attempt to enter an access code failed". I am then (apparently, this is confusing) instructed to watch for a new/subsequent email containing a new code (?).
I attempted all of this approximately 5.5 hours after receiving the email (in case the "code" is for some inexplicable reason extremely time sensitive). I have indeed pre-ordered ESO "Morrowind" (from Amazon.com, weeks ago), if that means anything.
All of this looks like a clumsy attempt at phishing. I would hope that if ESO actually wanted me to participate in the closed beta, they would provide a means of accessing the game successfully (without being so time sensitive that a 5 hour delay was significant). An access method that fails cryptically, as this one has, doesn't seem very useful.
Unless someone in an official capacity responds here with precise instructions regarding what to do, I am going to disregard this email, and all such further emails, on the assumption that they are phishing attempts. I will also virus scan my system, just in case.
If this is indeed a phishing attempt, no doubt others will receive similar emails. Be advised.