I use Microsft Exchange Server 2003 Enterprise. I can send mail to yahoo, gmail and other mail server but i can't send mail to hotmail. When I try send to hotmail Undeliverable mail as below: Your message To: hang.sopheak@hotmail.com Subject: hi Sent: Mon, 3 Mar 2008 10:34:50 +0700 did not reach the following recipient(s): hang.sopheak@hotmail.com on Mon, 3 Mar 2008 10:47:39 +0700 There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <usoft-server.usofttechnology.com.kh #5.5.0 smtp;550 DY-002 Mail rejected by Windows Live Hotmail for policy reasons. The likely cause is a compromised or virus infected server/personal computer. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support>Please help, Can you tell me how should to do?

Hi, Is your external DNS configured properly? You need to gave a PTR record created - your external DNS hoster should be able to help with this. If this is not the case you need to contact live hotmail and ask them why they are blocking mails from you. Leif

Thank for reply Leif, this problem cause live hotmail block mail from my public IP so I contact to live hotmail and now they remove block my domain already.Sam

Reporting-MTA: dns; iscmi.gov.egX-Postfix-Queue-ID: 3F326699X-Postfix-Sender: rfc822; aly@iscmi.gov.egArrival-Date: Wed, 28 May 2008 17:30:39 +0300 (EEST) Final-Recipient: rfc822; tegana2003@hotmail.comAction: failedStatus: 5.0.0Diagnostic-Code: X-Postfix; host mx4.hotmail.com[65.54.244.104] said: 550 DY-002 Mail rejected by Windows Live Hotmail for policy reasons. The likely cause is a compromised or virus infected server/personal computer. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/network admins, please visit http://postmaster.live.com for email delivery information and support (in reply to MAIL FROM command) why there no open relay or spam in our domain iscmi.gov.eg..

hi sam.excuseme, but can you tellme the email which you send the request of whitelisting?thanks

hi, Sam. I am facing same sort of problem. How do you contact live hotmail to remove block (Email id or Phone Number) Please kindly inform Sathar

We too got this problem, does anyone have a contact for this domain?

We have this problem too. Any solution?

We contacted Hotmail and we did implement an SPF record for our domain. It has not happened since.