Fixing slow SquirrelMail version 1.4.15.
If you’ve got a large inbox and you’re using SquirrelMail to view it, you may notice page loading times are poor using the default configuration. There is a simple fix that will allow SquirrelMail to load emails using multiple threads and server sorting which means that the performance will improve significantly when accessing your email via a web browser.
Edit your config/config.php file:
find the lines:
$allow_thread_sort = false;
$allow_server_sort = false;
and change them to:
$allow_thread_sort = true;
$allow_server_sort = true;
You need to restart your web server (assuming apache):
And then login to your web mail page. With any luck you’ll have noticed a significant performance boost. For further performance tuning information see the SquirrelMail website guide at: http://www.squirrelmail.org/docs/admin/admin-6.html