These are legitimate Wolfram emails and you can safely follow the hyperlinks. They inform you about useful new developments. The hyperlinks of this type are so called "shortened urls" used in order to avoid overly long hyperlinks in text. You can make your own using the Wolfram Langauge. For example, for this very post:
URLShorten["http://community.wolfram.com/groups/-/m/t/615438"]
https://wolfr.am/8i4Eg4Iw
In future please contact Wolfram directly at
http://www.wolfram.com/support/contact/email
for inquiries of a similar nature.
