Why do I get this error? Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0B

You may receive this error in your email client settings at some point. In Outlook this is a bug and can usually be resolved by restarting your email client and making sure you have SMTP authentication enabled.

This is not a server problem and is caused by a miconfigured email client, ISP's blocking access to port 25 and using port 26 instead or a DNS problem with your ISP.

To confirm that the mail server is online and responding you can perform the following:

From the 'Start' button click 'Run'
Type in 'telnet yourdomain.com 25'
You should receive something to the effect of:

220-server.*****.com ESMTP Exim x.xx #1 day, xx Month 2006 time
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.

This confirms there are *no problems* with the SMTP server

To confirm the POP server is online and responding:

From the 'Start' button click 'Run'
Type in 'telnet yourdomain.com 110'
You should receive something to the effect of:

+OK Hello there.

This confirms the POP server is online and there are *no problems* with the POP server.
  • 0 Users Found This Useful
Was this answer helpful?

Related Articles

I can't send/receive email, Outlook Express generates an error 0x800cccOE, what do I do?

The Symptoms If you can't send/receive your email, you may get one of the...

E-mail delivery failing with error 'retry timeout exceeded'?

If you are having problems receiving email on your account and are unsure as to what the...

Apple Mail The recipient “user@domain.com” was rejected by the server.

The error message is “A copy has been placed in your outbox. The recipient “user@domain.com” was...