Squirrelmail works fine as long as I'm the only one using it. When more than one "connection" is made, the Squirrelmail drops everyone back to the login prompt and no valid user-passwd combinations work.
Restarting courier-imap fixes this temporarily.
in your courier-imap configuration (normally /usr/local/lib/courier-imap/etc/imapd)
what do you have the values set at for:
I set mine to 512 each. why? squirrelmail connects normally on localhost, 127.0.0.1. which means a lot of concurrent connections to localhost. If you have a small value for those two variables, people will be locked out pretty quickly.
Paul Theodoropoulos http://www.anastrophe.com