Outlook: Error Message: 0x800CCC0B

First try restarting your computer. If the error persists try removing the mail account from your mail client, close it, and re-add it.

Email Configuration Tutorials

You will also want to make sure your Internet Service Provider is not blocking port 25 access outside their own service. By opening a shell/command prompt and typing "telnet mail.yourdomain.com 25" you should be able to reach it. If not, your ISP or software you have installed is blocking your access.

Now as an available option you may use port 50 as an alternative port for sending mail via SMTP.
  • 535 Users Found This Useful

Was this answer helpful?

Related Articles

Are the master mail account and system account password the same?

Yes. Changing your system password will change your master email account password.  

Mozilla Thunderbird and Email Forwarding

The default forwarding method of Mozilla Thunderbird can result in servers blocking emails as...

Why can I not connect to the mail server?

There are several reasons why you may not be able to connect to the POP3 server, and thus, not be...

Outlook: Error 0x800C013B When You Attempt to Send a Message

When you try to send a message in Outlook Express, you may receive the following error message:...

Cannot write to cache directory /tmp/horde

When I try to access web mail in the cpanel and get this messageA fatal error has occurred...