Monday, October 11, 2010

Connecting To not open connection to the host, on port 25: Connect failed.

Many people have that problem. It may be caused by several reasons: firewall, antivirus, security policy of ISP, etc. In my case, it was antivirus software which blocked 25 port.

Steps to identify problem.
1. Telnet host on 25 port. See for details.
2. Try to turn off firewall.
3. Try to turn off antivirus. Worked for me! Add the process and / or port to exceptions.

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