Here’s an email from someone calling themselves Marvis:

I am having a cocktail near your house.
Do you want to call me on a date?
I have some free time and I’m excited about new acquaintances.
See my location, bloke.
Check the link.

?c25ydWJAcnViZW5zY2hhZGUuY29t

See my location, bloke? Paying for a botnet to send your junk, but forgetting to put the FQDN before the gibberish? Classic Marvis.