Your example is classic Spam. Spam usually is thought of as being in mailboxes, but spam appears everywhere -- in forums, social sites, etc. Spam appears regularly in Yahoo Answers -- which spam you can help remove by clicking "Report Abuse" as you notice an inappropriate "answer".
Anything unsolicited -- especially unsolicited "form letter" advertising -- should automatically be suspected to be spam. That's the world we live in, in large part thanks to Windows-based botnets -- perhaps including your own computer.
Spam is often carefully crafted -- as your example is -- by "human engineering" that makes the message appear "genuine". Spams often refer to legitimate sites or services, or current events, and its spam cargo is usually a link to a malicious site that will infect Windows operating systems -- having nothing to do with the supposed subject at hand. Click the link and you JOIN THE BOTNET! Avoiding the negative results of spam is part of why I use Linux.
Even if you accept that everything from an unrecognized source -- and possibly odd communications from someone you do recognize -- is likely to be spam, you'll still benefit from the #1 best spam-rejection email outfit. Use a gmail address available from http://mail.google.com and you'll soon be able to answer your own question, "Is this one spam?".
Google helps you recognize spam campaigns because you can browse your spam folder and see things they've professionally identified as spam -- like multiple spams supposedly about ASK.FM. Whatever you do -- don't click on links while viewing a spam mail. In fact, use Google's capability to not display pictures either, as simply viewing a rigged picture can compromise your computer, unless you've got all the latest updates -- for both Windows AND for all the many third-party programs for Windows like Flash and Acrobat Reader.
Good luck!