Hi Mark, Its pretty much the same, use *@yahoo.com, here is an article that gives you some other variables: http://www.msexchange.org/tutorials/MF014.html Mark Fugatt MCSE, MCT, Microsoft Exchange MVP Pentech Office Solutions Inc www.4mcts.com Tel: 585 586 3890 Fax: 585 249 0316 Cell: 585 576 4750 Visit www.msexchange.org for valuable information about Microsoft Exchange -----Original Message----- From: Mark Budman [mailto:mbudman@xxxxxxxxxxxx] Sent: Sunday, January 19, 2003 7:00 PM To: [ExchangeList] Subject: Blocking incoming email Hello, I would like to block incoming email. I know how to do it based on a single email address (e.g. xyz@xxxxxxxxx), but is there a way to block out and entire domain such as "@mail.winbigusa.com"? Please let me know. Regards, Mark mbudman@xxxxxxxxxxxx