我的Outlook express为何只能收邮件，不能发送邮件，如何解决，谢！ netrobber2008-08-27 09:24:47

出现一下信息：

The message could not be sent because the server rejected the sender's e-mail address. The sender's e-mail address was 'harry@wmleow.com.sg'. Subject 'test', Account: 'www.wmleow.com.sg', Server: 'www.wmleow.com.sg', Protocol: SMTP, Server Response: '530 Authentication required', Port: 25, Secure(SSL): No, Server Error: 530, Error Number: 0x800CCC78

Outgoing server (SMTP) requires authentication

Thanks a lot!