One of my client's domain is blacklisted by windows live hotmail. the domain is thehillgroup.com, IP 216.214.32.82. Below is the error message: Your message did not reach some or all of the intended recipients. Subject: RE: September 1, 2010 Timesheet /Question re: Grant Review Honorarium Sent: 9/1/2010 2:10 PM The following recipient(s) cannot be reached: JOANNE LAFLEY on 9/1/2010 2:10 PM There was a SMTP communication problem with the recipient's email server. Please contact your system administrator. <hg-nts1.Thehillgroup.com #5.5.0 smtp;550 SC-001 Mail rejected by Windows Live Hotmail for policy reasons. Reasons for rejection may be related to content with spam-like characteristics or IP/domain reputation problems. 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> The domain is not blacklisted on any other blacklist. Please delist us as soon as possible.

Are you using senderID? have you submitted your record to Microsoft? https://support.msn.com/eform.aspx?productKey=senderid&page=support_senderid_options_form_byemail&ct=eformts&st=1&wfxredirect=1 Mike Crowley Check out My Blog!

Hello Alex, => Checked whether you have a proper PTR record for your domain http://postmaster.aol.com/cgi-bin/plugh/rdns.pl You are unable to send or receive SMTP messages from certain Internet domains in Exchange 2000 Server, in Exchange Server 2003, and in Small Business Server 2003 http://support.microsoft.com/kb/300171/en-us => Also create a SPF record for the Domain Sender ID Framework Record Wizard http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/ Sender Policy Framework http://www.openspf.org/ After that you can go to http://postmaster.live.com link and request for whitelist Hotmail.com. And checked why Hotmail is rejecting the Emails. Also Install the Antispam to filter the Spam. It will help to fix the issue.EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT