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

Updating Outlook SSL Certificate

You may want to install SSL for your email or update an existing certificate you had installed...

Does email on the server count towards my allotted space?

Yes. Any e-mail you have stored on the server counts as storage for your account. This is one...

Do you support IMAP?

Yes! We support IMAP. You can also set your mailbox to whatever size you like, which uses your...

How may I create a mailing list?

Login to the control panel. Locate the icon "Mailing Lists" within the "Mail" section....

How do I change the mx records?

Simply go into your control panel with Ultra, click Zone Editor, then click "Manage". The MX...