search for: dovecotmailserver

Hi, I am a new linux user.I jz setting up a mail server.Downloaded & Configured the components:CentOS,OpenLDAP,pam,dovecotMailServer,s endmial,squireelmail etc.... But wehn i want to check whether it works or not, so i open up my clientmail, wchi is Netscape 7.2. in Edit > Mail & Newsgroups Account Setting > server setting... i had put the ip address for the machine... but error pop out: Could not connect to mail serve...