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How to check the status of replying mail in Exchange 2003

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]


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