What is a 421 email error?

Outlook Express SMTP error with Yahoo Email?

• Hi Folks I having problem with my SMTP setting in outlook express with Yahoo email lately. Outlook Express 6 Server Information Incoming server is POP3 server Incoming mail (POP3): pop3.mail.yahoo.com Outgoing mail (SMTP): smtp.mail.yahoo.com Server Port Number: Outgoing mail SMTP:465 This server requires a sercure connection (SSL) - Checked Incoming mail (POP3):995 This server requires a sercure connection (SSL) - Checked Error Message Received 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 'test', Account: 'pop.mail.yahoo.com', Server: '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 Error Message Received 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 'test', Account: 'pop.mail.yahoo.com', Server: '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 seem to be using the server names for the FREE Yahoo mail and the Port numbers for the PAID version Yahoo Mail Plus. See correct settings below. Yahoo Plus Incoming Mail Server (POP3) - plus.pop.mail.yahoo.com (SSL enabled, port 995) Yahoo Plus Outgoing Mail Server (SMTP) - plus.smtp.mail.yahoo.com (SSL enabled, port 465, use authentication) If you need to upgrade, go to Options > Mail Plus > Upgrade now > enter your payment details for $19.99 annual fee to complete the process.