Not able to send emails in Windows Mail

[SPRING THOMASON]

I am using Vista Home Premium as my operating system. I use Yahoo Plus Mail
and have set up to receive and send through Windows Mail. I am able to
receive my mail with no problem, however I have not able to send out mail. I
have checked by server address and it appears to to correct. Can someone
offer a fix to this?
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
'Colton's Birthday', Account: 'plus.pop.mail.yahoo.com', Server:
'plus.smtp.mail.yahoo.com', Protocol: SMTP, Server Response: '553 From
address not verified - see
http://help.yahoo.com/l/us/yahoo/mail/original/manage/sendfrom-07.html',
Port: 25, Secure(SSL): No, Server Error: 553, Error Number: 0x800CCC78

 

[t-4-2]

Here are the basic server settings for Yahoo! Mail: ( Please compare with
what you entered, i.e. smtp Port # 465, not 25 )

Incoming Mail (POP3) Server: plus.pop.mail.yahoo.com (Use SSL, port: 995)
Outgoing Mail (SMTP) Server: plus.smtp.mail.yahoo.com (Use SSL, port: 465,
use authentication)
Account Name/Login Name: Your Yahoo! Mail ID (your email address without the
"@yahoo.com")
Email Address: Your Yahoo! Mail address (e.g., (e-mail address removed))
Password: Your Yahoo! Mail password

t-4-2

 

[Dave]

The last name (tomson) in the email address in the error message doesn't
match the name you used posting to this group (tomason).

 

[Gary VanderMolen]

You have at least two different problems.

1. You are using mail serving settings different than the ones specified
by Yahoo:
http://help.yahoo.com/l/us/yahoo/mail/original/mailplus/pop/pop-14.html

2. You are using a non-Yahoo 'From' address that has not been verified
by Yahoo.