The message could not be sent because the server rejected the sender's email address. The sender's email address was '**********@private.site'.  It's a godaddy email using IMAP across an Ethernet connection.

Subject 'Chicago Greeter Hello'

Server Error: 530

Server Response: 530 authentication required

Server: 'smtpout.secureserver.net'

Windows Live Mail Error ID: 0x800CCC78

Protocol: SMTP

Port: 25

Secure(SSL): No

I have already tried reloading the email account by deleting and reloading the account.  No problem with incoming messages.  Also, my POP email account from a different ISP is unaffected.

What do you suggest?