[Skunkworks] How to Delete Multiple Outbound Emails[from a Particular E-mail Add] from an Exim Queue

Hello good people , I have a rogue account sending mails from my webmail actually multiple email accounts doing this..been deleting this manually from the exim queue ..They beat me to that game..too many mails to keep up with.Some help someone? That's for the short term..I further Need to identify which user in my network this mails are emanating from..a pointer on how to go about this is welcome too.