[Greylist-users] can greylisting be done per-user on a multi-domain box?

[Miles Keaton]

Can greylisting be done per-user on a multi-domain box?

We're using Qmail on FreeBSD for webhosting - about 200 domains per
server - and I think our clients could really benefit from us enabling
greylisting as an option on the server.

But is it possible for some domains to enable it, and some domains to
bypass it?  Or is it only a system-wide solution right now?