config the outlook

hi,
i do not know how to config the outlook express to get old mail from lists.osr.com,
please help me.
when the outlook express connect to list server a error occur as follow:

/**************************************************
480 need authorization.

setting:
account: lists.osr.com
server: lists.osr.com
protocol: NNTP
port: 119
security(SSL): 0
error code: 480
code: 800ccca4
*****************************************************/

what should i do???

ildee