I guess you didn't get the word, but for quite some time now,
AT&T wants you to use different servers and settings:
http://helpme.att.net/article.php?item=10918
Gary VanderMolen
"Sunshine" <Sunshine@discussions.microsoft.com> wrote in message news:B7593DBB-F49D-493F-8EE4-8E5158C7E421@microsoft.com...
> Hello,
> I am very disappointed with this Windows Mail from Vista on this specific
> issue... I have uninstalled Norton, installed Avast... check the port issue
> that Brian did but still for almost 2 weeks now, I can send and receive email
> from it... PLEASE help , I am getting impatient with this ... I have yahoo
> mail trying to add in this account.
> This is the error I am getting :
>
> An unknown error has occurred.
> Subject 'test', Account: 'pop.mail.yahoo.com', Server:
> 'smtp.mail.yahoo.com', Protocol: SMTP, Server Response: '421 Cannot connect
> to SMTP server 69.147.95.94 (69.147.95.94:25), connect error 10060', Port:
> 25, Secure(SSL): No, Server Error: 421, Error Number: 0x800CCC67
>
> My laptop is at home, I have AT&T as service provider.
>
> Thanks, Sunshine.