If you get this error:
Fatal error: Failed opening required '../config/config.php' (include_path='.:/usr/local/lib/php') in /usr/local/squirrelmail/src/login.php on line 57
- Rerun "cd /usr/local/squirrelmail && ./configure" and configure all the screens -- I got this once after apparently partially configuring.
- Make sure the permissions on the squirrelmail directory are set correctly.