[Exim] HOTMAIL

Hi List.

I get a tremendous amount of mail from hotmail
to the account inocencia**** {where * is a random letter.}

This account does not exist on my network.
Is there a way to deny_recipient inocencia****????

I blocked multiple recipients but the last 4 letter keep changing.
My /var/spool/exim/input file fills up rapidly

<side note>
Someone please nuke hotmail.

Regards,

Tom Kinghorn