Squirrelmail is an IMAP Client written in PHP.
Squirrelmail can run with Citadel by connecting to it via IMAP. To configure it, map it to the folder structure Citadel provides by modifying the following SquirrelMail config settings:
$default_move_to_trash = true; $default_move_to_sent = true; $default_save_as_draft = true; $trash_folder = 'INBOX/Trash'; $sent_folder = 'INBOX/Sent Items'; $draft_folder = 'INBOX/Drafts'; $auto_expunge = true; $delete_folder = false;