With no Sprint circuit ID or NUA you probably will not get very far. Try: 800.877.5045 option 2 (NOC) noc_support@sprint.net -----Original Message----- From: Sabo, Eric [mailto:Eric.Sabo@calu.edu] Sent: Friday, March 08, 2013 11:17 AM To: mailop@mailop.org; nanog@nanog.org Subject: enterprise messaging gateway @ sprintpcs.com I am trying to get our email server off their block list, I tried a couple phone number at this point and I haven't be able to locate anyone to help me for this domain. If anyone has any contact information on this domain, please share it. Probably by the time I get in contact our domain will be reset. Thanks in Advanced, Eric