cPanel have been maintaining the client themselves, but have now decided to withdraw their coding support for Squirrelmail.
In order to keep our clients as safe as possible, we have withdrawn the Squirrelmail webmail client ahead of the planned cPanel depreciation and removal schedule.
If you were a Squirrelmail user, we recommend that you switch to Horde or Roundcube.
If you need any assistance with this change, please do not hesitate to open a support ticket.
Thursday, May 3, 2018