Tonight I got the following email (I looked at the headers and they appear legit -- they passed both SPF and DKIM tests):
This email is to confirm that you have been de-enrolled from My Account. If you would like online access to your Verizon Wireless account in the future, please visit www.verizonwireless.com and re-register at My Account.
And www.verizonwireless.com appears to be dead at the moment (both for me and some friends on a different ISP than I).