microsoft outlook mail problem

microsoft outlook cant download emails from new server

i get this error message :

0x800CCC90 your incoming POP3 email server has reported an internal error. the server responded:-ERR service not available( server error)

APF installed , ports 25 and 110 open
NeoMail ,Horde , NeoMail send & recieve emails with no problem
no mailscaner installed
disabled norton anti virus didnt help
tried Eudora , same error reported

i have read all posts related to this problem in this forum and cpanel & eve1 forums also in google and didnt find any fix for this problem

WHM 10.0.0
cPanel 10.0.0-R7
CentOS 3.4

 

 

 

 

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