quotas and warnquotas

Hi,

I know this is isn't only related to Suse, but as I'm using it 9.0 I
don't know where to post it.

I have already configured quotas for my system (shared directory over
NFS) and I want to configure warnquota's. Is there anyway to change
the normal behaviour of sending emails to user@my_choosed_domain
instead of user@localhost (where is located NFS). As users doesn't
have an account there (or well, they don't use it) they can't get
warned about it.

Thanks

.