CDO: The transport failed to connect to the server.

Hi,

Anybody knows what are the possible causes for error: "The transport failed to connect to the server" when I try to send email using CDO?
I've "ping" and "telnet" SMTP server successfully.

Thanks.
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lilyxyAsked:
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Cherukuri30Service EngineerCommented:
Possible reson for this could be your DNS name resolution or Proxy or Firewall check these three and then try by specifying the value with IP address.
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Cherukuri30Service EngineerCommented:
hope ur SMPT is running on port 25
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lilyxyAuthor Commented:
Thanks, cherukuri30.
I can send email with "telnet" from the server which is installed IIS.
Does this mean SMTP server is working properly?
The problem may be in the IIS setting. Any idea?  
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lilyxyAuthor Commented:
Although I still don't know why, the problem is solved after I uninstall and reinstall "Message Queuing" component.
Just a clue for all that are facing the same problem.  
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Cherukuri30Service EngineerCommented:
Yes it does happens sometime and we cant figure out where it is going wrong, The best resolution for this is just as you did uninstall and reinstalling
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