Since RoundCube version 0.6, you may expect the following error when trying to delete a message :
Server Error : UID COPY : Error in IMAP command received by server.
You probably using Courier-IMAP daemon. As commented in “main.inc.php” configuration file for default storage folders, you need to modify the folder name according to the fully qualified name. Just add ” INBOX. ” in front of each folder name and it should be working.
So, as exemple, the default value :
$rcmail_config['trash_mbox'] = 'Trash';
Should look like this :
$rcmail_config['trash_mbox'] = 'INBOX.Trash';