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Connection to host lost

Posted on 2006-10-24
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Last Modified: 2012-08-13
This is when we are trying to access our Exchange 2003 server on a Windows 2003 Server.

When running the following command:

telnet {servername} 110

We receive the following error message:

"connection to host lost"

This all of a sudden started happening. One thing when did this weekend was reboot our Exchange server; I noticed the telnet service was disabled. I manually started the service, but we are still receiving the same error message when running the telnet command...not sure if this has anything to do with the issue we are experiencing. Does telnet service have to be started for the telnet command to work?

 We have a  third party help desk software that forwards e-mail to an exchange mailbox and this is the error message we are receiving:

"Mail Sentry - Could not connect to POP3 server because socket error occurred while trying to open socket"

I went and looked at the Exchange POP3 service; it is set to automatically start and the status was "started"

I tried to restart the service but it timed out and it’s in a “starting” state

It has been stuck in this state for quite some time.

Do I have to reboot server?

Tx,

histate
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Question by:HiState
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Expert Comment

by:IT-CS
ID: 17799314
I would try and reboot of course, can you telnet to port 25 this will eliminate if the issue is Telnet or the server not responding.
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Author Comment

by:HiState
ID: 17799363

I am able to telnet into port 25

Even with the telnet service stopped

I will leave it stopped since this was originally set to manual and it does not seem to affect the telnet command…. I wonder why? Is this because it is using the ESMTP Mail Services?


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Expert Comment

by:IT-CS
ID: 17799416
Try using another product PUTTY it makes it easier to telnet and view the commands can be found here.

http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

In the meantime view this article and see if it helps. http://support.microsoft.com/kb/161118

Do you get any reply from the exchange server on Port 110 or do you simply get a blank screen?

Is it possible the firewall is blocking that port or not forwarding to the internal IP address of the server you are trying to connect to.
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Author Comment

by:HiState
ID: 17799725

I was getting "connection to host lost" from one PC and from another a blank screen.

I rebooted the server and now I am able to telnet 10 port 110

Thanks for the KB this is a good troubleshooting article for future mailbox connection issues

I will take a look at PUTTY

How do I close this request?

Tx,

histate
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Accepted Solution

by:
IT-CS earned 1000 total points
ID: 17799834
Just accept my last answer as the one you used and it will close out.
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