Block e-mail addresses from e-mailing any user on server

Youre creating a rod for your own back and an almost impossible task.
Compiling lists of offending spammers would be all but impossible.
You might get 10 spam emails from one sender and none ever again.
They tend to use bots, with throw away email addresses.

An easier solution for starters would be to use RBL's.
In Exim Config under RBL's, click manage custome rbl's and add the following few entries.

Code:

AbuseAT                cbl.abuseat.org      https://www.abuseat.org/
Barracuda             b.barracudacentral.org      http://www.barracudacentral.org/rbl/removal-request
SemFresh30         fresh30.spameatingmonkey.net      https://spameatingmonkey.com/services/SEM-FRESH30
SemURIBL            uribl.spameatingmonkey.net      https://spameatingmonkey.com/services/SEM-URI
semblack              bl.spameatingmonkey.net      https://spameatingmonkey.com/services/SEM-BLACK
spamcop              bl.spamcop.net      http://spamcop.net/bl.shtml

screenshot attached

 

Also, CSF mailscanner has tools built in to block specific email addresses.
You can blacklist at the click of a button.
It's not free, but it's not expensive either.

 

Maybe it's possible to create your own RBL and configure exim to use that as well.
Just point the url to your own file.
You could 'I guess' put anything you want in your own RBL, but this really would be a thankless task one of which which you will soon get bored of, im sure.

CSF mailscanner has a gui, you select the email you wish to blacklist and click the blacklist button, but even that is tiresome.

Some spammers set up an email, use it for a few days, get blacklisted and dump it in favour of another. Those spameatingmonket RBL's look at the age of a domain and block based on this.

I've also changed the scores on some of the spamassasin rules which has helped a little.