Milter-greylist

Hi!

I have the user database in sendmail`s aliases. So, without
milter-greylist, sendmail refuses mails destinated to unknown users as
expected.

But if milter-greylist is running, milter-greylist add a new line to
greylist.db file whithout checking if the destination user exists or
not. So, my greylist.db file is growing up due to innecesaries entrys .
Actually, 80% of entrys in greylist.db are related to unknown users.

I would like sendmail to check if the destination user exists before
checking milter-greylist. Is it possible?

Thanks in advance,

Jorge