Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0B

Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0B


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.lunarpages.com ESMTP Exim x.xx #1 day, xx Month 2004 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 POP3 [cppop x.x] at [xx.xx.xx.xx] (yourdomain.com)

This confirms the POP server is online and there are *no problems* with the POP server.

Link to Microsoft support:
http://support.microsoft.com/default.aspx?scid=kb;en-us;827349

http://support.microsoft.com/default.aspx?scid=kb;en-us;827149