Many of them do not seem to have any purpose at all (except to possibly annoy) because they neither advertise a product nor contain any clickable links.
Here are some shining examples:
From ner-maps-forum@maps.org:
kirkFrom part1.07050000.05040004@rivieramaya-today.com:
dirk lucky
bobFrom jackflash4x@northstate.net:
wei-ning havivah
ritaFrom heathiaarethan3os@ms18.hinet.net:
elvira dan
hokFrom herbert.b.knight.51@alum.dartmouth.org:
harkin gino
evieNice collections of names, I must admit. Perhaps I should continue collecting these spams and some day put together a book of first name suggestions for parents to be.
olaf chance
Here's what arrived today, with the subject "Dont be left behind because of bad health":
Urgent question of the night.
That one came from my dear concerned but, alas, unknown friend Ephrayim Gordon at chriscasey03@goliat.com.
An urgent question of whatever indeed!