Windows e-mails

[Teacher]

I can't send email suing windows email. It says

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 '',
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: 25,
Secure(SSL): No, 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.

However, you are using an obsolete port setting for that server.
Update your settings to agree with this:
http://helpme.att.net/article.php?item=10707