There are two words that you will find in almost any unsolicited bulk email: you requested.
More Email Quick Tips
Don't believe it.
Spammers count on your uncertainty, and that in doubt you will rather not take any action and complain about the spam.
Chances are, however, that
- you did not request anything,
especially if
- there is nothing about the company or person sending you bulk email you recognize, or if
- the service offered does not sound like something you would ever be interested in or request.

