Yes, I can delete him or even block him; I'd just really like to get him chucked off his mailing list people.
You have to come to terms with it never happening.
I had a spammer misspell the front end of an email to me. Because any email address which doesn't exist on the domain goes to where I tell it to, it never bounces.
The next thing that happened was I started getting other junk to the same address. The git who misspelled it in the first place, then on-sold the address to other spammers. So for years I've been getting spam to an address which never existed.
Mind you, there are 2 ways of getting off lists.
1. Change your email address.
2. Move your domain to another host.
I did 2 last year, and more than half my spam vanished when for 24 hours, everything bounced.
I also did 1 around the same time, finally getting rid of my original dial-up account and its associated emails.
Between the 2, my spam dropped by about 90% for a while.
However, both may be unavailable to you.