check your PTR records for your domain mail.tmc.com.sg You should be able to do a reverse lookup - if not check your DNS. Make sure your not on any blacklist, since you where a open relay. -----Original Message----- From: MVL Hanumantha Rao [mailto:hanumantharao@xxxxxxxxxx] Sent: Sunday, June 08, 2003 3:10 AM To: [ExchangeList] Subject: [exchangelist] Exchange Server 2000 Dear Sir, I configured my Exchange Server 2000 to stop the relay. 'Anonymous Access' checkbox is enabled. Even though, open relay is stopped I am getting Non Delivery Reports and Bad emails 200+ a day. Please suggest. Thanking you in advance. Regards, Rao System Administrator.