I'm installing Emumail, and having a rather annoying issue:  It only
shows the first five messages in my system's INBOX.

I have confirmed that it's opening the correct mailbox file:
/var/spool/mail/rs (and so on).

This is VA Research Linux, version 6.2.4.  apache 1.3.24, php 4.2.3. 
Latest imapd available from ftp://ftp.cac.washington.edu/.

PHP config: './configure' '--with-xml' '--with-gettext' '--with-mysql'
'--with-imap-ssl' '--with-ftp' '--with-kerberos'
'--with-apxs=/usr/local/apache-imp/bin/apxs' '--enable-sockets'
'--with-imap' '--with-zlib' '--with-pear' '--with-openssl'
'--with-mcrypt'

I would be absolutely thrilled to provide more details; I can't think
of anything else to add at the moment, though.

I have absolutely no knowledge of the program you're running, so I'll
suggest something about email generally - have you got it selected
somewhere to only show messages '1-5', or to only show 5 messages at a
time or something like that?