Why am I getting 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 misconfigured 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.dnsprotect.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 that 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 [cppopx.x] at [xx.xx.xx.xx] (yourdomain.com)

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

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