Weird, pointless question-asking spam

This arrived in my email today:

There’s no attachment, no link, no embedded web bug image or anything like that. No real payload. At first, I thought it might actually have been a legitimate (albeit very ignorant) question - my website does have pages about blackberries and pages about apples (fruit, not electronics).

But it is spam. A quick google of ‘I was thinking that your advice would be very helpful’ reveals that there are people all over the net being asked similarly pointless questions on a wide variety of topics.

So what’s it for? I guess it might just be an attempt to verify me as a real person by getting me to respond in any way at all (I didn’t - and I’ve set up a filter to block any future examples like it).

Yeah, I think it’s just looking for confirmation of a valid email address with a live person on the other end.

So, what is the difference?

An apple is a fruit. A blavkberry is a typo.