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7.8

using telnet to determine if smtp port 25 is open

Asked by cliffordgormley in Email Servers, TCP/IP, Exchange Email Server

Telnet Client: Windows XP
Telnet Server: Windows 2000 Advanced Server

Can I use the telnet client on my xp machine to determine if tcp port 25 is open on a telnet server (exchange Server)?

I tried, and here is what I get, even though the telnet server (exchange) is listening on port 25.

C:\>telnet outbound.fakemailservertest.net 25
Connecting To outbound.absmailgateway.net...Could not open a connection to host on port 25 : Connect failed

I thought I could do this, but somebody told me the following, and I am not sure if it is correct:
"MS supplied Telnet client to ports is not supported"

Thanks
Cliff
[+][-]02/04/08 03:04 PM, ID: 20819076Accepted Solution

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Solution Provided By: Darylx
Participating Experts: 4
Solution Grade: A
 
[+][-]02/04/08 03:06 PM, ID: 20819089Expert Comment

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[+][-]02/05/08 05:50 AM, ID: 20822775Expert Comment

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