I have received these emails too.
I assume they are a scam of some kind.

I get a lot of fake escort requests too, they always say they are coming to my area on business and would like to send big money in advance of their visit to secure services....It's a scam.

I never respond to any of them, once they learn your email is legit they will hound you daily.

It's the bait and switch money order/ check scam with an adult twist.