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To check if your Exchange server relays mail, you can use telnet to test it. You need to do that outside your LAN. C:\> telnet Welcome to Microsoft Telnet Client Escape Character is 'CTRL+]' Microsoft Telnet> set localecho Local echo on Microsoft Telnet>open chicagotech.net 25 220 ss026.sdf.ms-mvps.com ESMTP ms-mvps.com Sendmail; Fri, 7 Oct 2005 17:13:13 - 0400 (EDT) helo chicagobotech 250 ss026.sdf.ms-mvps.com Hello [70.x.x.x], pleased to meet you MAIL FROM:<tester@chicagotech.net> 250 2.1.0 <tester@chicagotech.net>... Sender ok RCPT TO:<receiver@howtonetworking.com> 550 5.7.1 <receiver@howtonetworking.com>... Relaying denied. IP name lookup failed [70.x.x.x] QUIT Post your questions, comments, feedbacks and suggestions Related Topics
Troubleshooting exchange issues
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