> Fatal error: Maximum execution time of 30 seconds exceeded in
> /var/www/squirrelmail/functions/imap_general.php on line 72
>>>>

squirrelmail waits 30 seconds for a reply from the IMAP server,
 and if it does not get one it spit out what you are getting
check your IMAP server settings - remember squirrelmail does not yet do imap
over ssl

 -munir