When you try to send and receive e-mail on Microsoft Outlook, you may receive following error message:
These error messages may occur if Microsoft Outlook or Microsoft Outlook Express cannot establish a connection with your e-mail server. These error messages are frequently caused by one of the following:
1. Wrong configuration of email client
2. Your ISP blocks port 25
3. DNS problem at your ISP
When you facing above problem, you can try to check your email client setting or disable your firewall setting to solve this problem. In my case, I just allow POP3 with SSL and change the pop3 port no 25 to 995. After change, my Microsoft Outlook work fine.
If you facing the same problem and have others solution, please leave your comment and share with me. 🙂