HELP:Netscape Messaging 4.1 on Solaris 2.6

I'm using Sun server E250, Solaris 2.6.

My problem are I,m already installed Netscape Messaging 4.1 all the services
for HTTP,IMAP,SMTP,POP already ON but I can't recieved email iether from
internal or outside. But the this server can email outside.

There are nothing error message from my outside email (ex: hotmail. or
Netscape.net) that mantion my Messaging Server got error.

I'm already got through the Document from Netscape Messaging but nothing can
help.

Anybody can assist of give a tips to solve these problem.

ASAP
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail athttp://www.hotmail.com.

[767 byte] By [CodeProf.com] at [2007-12-24 20:16:00]