Can I refuse specific domains?

[Jean Caron]

Hi all,

Possibly a simple question for most of you.

Can I reject messages destined to certain domains ? I seem to be dealing
with somebody that's got too much time on their hands, and my send queue
gets filled with messages for some strange domain. I will look into it
further, but for now, I would like to simply reject all mail addressed to
that specific domain.

Can it be done quickly ?

Thanks in advance.
Jean