I’m having trouble getting email to authenticate correctly using Telnet. I can get email using Outlook, OWA, and Sync is working too for mobile phones. The company is going to integrate Unified Messaging using a NEC product. The NEC product needs to be able to login through telnet. When I telnet to the exchange server to make sure that the account I setup for the UC is working correctly. I get the below read out from telnet. I tried other user accounts too and the same issues arise.
220 servername Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at
Thu, 18 Dec 2008 13:22:41 -0500
ehlo
250-servername Hello [192.168.168.101]
250-TURN
250-SIZE
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250-X-EXPS GSSAPI NTLM
250-AUTH GSSAPI NTLM
250-X-LINK2STATE
250-XEXCH50
250 OK
mail from: user@domain.com
454 5.7.3 Client does not have permission to submit mail to this server.
Connection to host lost.
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