stupid question about sendmail

[Wojciech Puchar]

how to redirect recipient address. i mean - if someone try to send to 
x at y.pl from serwer then it should be redirected to local account, while 
the rest of mails to domain @y.pl should get out normally.

alternatively outgoing mail to x at y.pl should be rejected.


tried access.db -

To:x at y.pl REJECT

doesn't work


any idea. thank you