The Cisco is setup to block telnet, I guess? But if you were able to do it, you'd see the same event that you posted, except for it having the gibberish username you would have typed into telnet. It even has whatever PID is tied to inetinfo.exe.
laytoncy, here's something you can try to simulate it:
http://www.kongtechnology.com/2008/01/27/smtp-authentication-and-send-emails-using-telnet
For me, against SBS 2003, the requirements differed slightly. After connecting:
ehlo
auth login
Note that it's "ehlo" and not "helo." After...
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