Why can't I send email on yahoo?

Why cant I send an email from outlook express. I have a paid subscription to yahoo mail plus?

• The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was '[email protected]'. Subject 'xxx (xx/xxx)', Account: 'plus.pop.mail.yahoo.com', Server: 'plus.smtp.mail.yahoo.com', Protocol: SMTP, Server Response: '530 authentication required - for help go to http://help.yahoo.com/help/us/mail/pop/pop-11.html', Port: 465, Secure(SSL): Yes, Server Error: 530, Error Number: 0x800CCC78

• Answer:

  You need to have a YAHOO PLUS account to configure yahoo in outlook..... Make sure that, you have saved all the settings in yahoo. Once you login you can find SETTINGS towards the top right corner. Click on SETTINGS ---> POP ACCESS & FORWARDING ---> Make sure that the radio button for WEB & POP ACCESS is checked. Open Outlook 2003 E-mail Accounts - Select the server as POP - Give the following details Incoming Mail Server (POP3): plus.pop.mail.yahoo.com Use SSL, port: 995 Outgoing Mail Server (SMTP): plus.smtp.mail.yahoo.com Use SSL, port: 465, use authentication Account Name/Username: Your Yahoo Mail ID Email address: Your Yahoo Mail ID Password: Your Yahoo! Mail password Once you have entered everything, then click on TEST ACCOUNT SETTINGS. If you have confirgured everything correctly, then you will receive a test mail. Hope this might solve your problem. http://help.yahoo.com/l/us/yahoo/mail/original/mailplus/pop/pop-14.html