strange emails that I can't unsubscribe

I've been getting these for about a week now. If I hit reply it comes back returned. They don't make any sense and I don't know who they are from.

How can I stop this?
If I hit reply this is the address it gives me: fa bitcall

Here's the body of the email:

Grey cells is with Quizget is your thinking caps in on tackle a quiz am beat all is quizzes if or you think youve of got. Grey cells is with Quizget is your thinking caps in on tackle a quiz am beat all is quizzes if or you think youve of got.

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Over some a trivia What a better a way get yourselves mood for Sainsburys pdfsport Answers pdf fa bitcall?
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Keep half of money raised other comes Reliefits am good excuse have long lunch or down or local pub canteen over in some trivia What or better way is get.
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Head pay enter is and then compete in either oneonone or or teams top a spot quizzing super in league keep half of money raised other comes Reliefits good excuse is.


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Version: 7.1.408 / Virus Database: 268.13.11/493 - Release Date: 10/23/2006