Can't send emails from Windows mail

[Naomi]

THis is the message I am receiving when I go to send an email. I can receive
my emails though.


The message could not be sent. The authentication setting might not be
correct for your outgoing e-mail [SMTP] server. For help solving this
problem, go to Help, search for "Troubleshoot Windows Mail", and read the
"I'm having problems sending e-mail" section. If you need help determining
the proper server settings, please contact your e-mail service provider.

The rejected e-mail address was '(e-mail address removed)'. Subject 'RE: Psychology
class (question)', Account: 'pop.att.yahoo.com', Server:
'smtp.att.yahoo.com', Protocol: SMTP, Server Response: '530 authentication
required - for help go to
http://help.yahoo.com/help/us/sbc/dsl/mail/pop/pop-11.html', Port: 465,
Secure(SSL): Yes, Server Error: 530, Error Number: 0x800CCC78

 

[Gary VanderMolen]

Make sure you have send authentication enabled.
Go to Tools, Accounts, select that account, Properties, Servers.
The box for "My server requires authentication" must be checked.