[exim] Help with Data ACL

Hi Guys,

I am wondering if someone could help me with a quick fix here. My server
is being bombarded with spam. I've looked at the type of mail coming in
and its all random IP's, bogus email addresses, but, I found something
consistent with all of the mail, all of them have this set in the
envelope:

Reply-To: HR manager <cointreerichard@???>

The consistent part is "HR manager".

Could anyone give me an example ACL that will deny the mail if the reply
address contains 'HR manager' (case insensitive match).

Kind Regards,
Alex.