How to deal with error number 0x800CCC79
When you try to send email messages you may receive an error
message that your email cannot be sent due to SMTP relay blocking.
The exact error message may vary, but it will be something similar
to the following. The message could not be sent because one of the recipients
was rejected by the server. The rejected e-mail address was
'<someone@some_domain.com>'. Subject: '<Test or anything>',
Account: '<Test>', Server: '<remotesmtp.wyith.net>', Protocol: SMTP,
Server Response: '550 <someone@some_domain.com>... Relaying Denied',
Port: 25, Secure (SSL): No, Server Error: 550, Error Number: 0x800CCC79
The cause of this error is due to the fact that all our SMTP servers
require authentication. Please consult the "SMTP authentication settings"
and "special settings for MSN, AT&T, AOL.com or Cox.com users" section
in the domain manager.