This Paypal notice of an email address being added to your accont is a hoax and part of a phishing scam ...

If you have received this email, please remember that it is very common for these email scams to be redistributed at a later date with only slightly different content or the same but with the fake page(s) hosted by a different provider. Also, once you have received one of these hoaxes, it is also common place to receive at least another one and usually a day or two after the first, although not necessarily from the same apparent sender.

The Spoof Email ...

The bogus web page ...