Can't send out e-mail by Notes6.5 client

[dongls]

请大家帮忙:
我已按照长颈叔叔所写的安装Notes6.5的客户端,并已设置好POP3及SMTP,只用于www.126.com的邮件收发,现在只能发到邮件,发邮件时提示下面的错误信息:
SMTP PROTCOL RETURNED A PERMANENT ERROR. FAILED WITH SMTP.126.COM