Before downloading Courier-IMAP, you MUST download and
install the Courier
Authentication Library. This library is standalone module
that maps login IDs and passwords to their mailboxes. Use the
tools in the courier-authlib
package to verify that the authentication library is working,
recognizes the login passwords, and displays the correct
mailbox location. Until you get the authentication library
working first, you will not be able to use Courier-IMAP.
Download Courier-IMAP from:
http://www.courier-mta.org/download.php#imap, then
read its INSTALL file for more
instructions.
The source code of the standalone Courier-IMAP version is also available from an anonymous CVS repository. See http://www.courier-mta.org/status.html for more information.
It is possible to create binary RPM packages directly from the source code tarball. Follow the instructions in the Courier FAQ for building the RPM packages as a non-root user.
The binary RPM will not install if you have another IMAP
or a POP3 server installed. The binary RPM installs its own
/etc/pam.d/imap and
/etc/pam.d/pop3 configuration
files, which are likely to conflict with the PAM
configuration file from another IMAP or POP3 server. If you
previously installed another IMAP or a POP3 server without
using RPM, Courier-IMAP
will successfully install and immediately overwrite your
existing /etc/pam.d/imap and
/etc/pam.d/pop3 files.