Censor Certain Words/Links In PMs?

[The Equivocate]

A particular user keeps rejoining and advertising his website via private messages. I know I censor words in posts but how can I censor words/links in private messages?

[FReeSTER]

A particular user keeps rejoining and advertising his website via private messages. I know I censor words in posts but how can I censor words/links in private messages?
If there is one I will like to know too. But I suggest you to block the web address he is publishing at your site. You can do this at the Admin CP not sure where though. Maybe someone will tell you exactly where u can block or edit any word with anything you want including this www.**********.com

U can also check this out https://vborg.vbsupport.ru/showthread.php?t=66316

Good Luck