Some time when you try to login to your
email account hosting you can see for 1 second the page that you can select any one of the given email client and after that you get redirected to horde (auto select setting)
In this case you need to disable the autoselect option for redirection and you can do it with the following steps:
login to each of the account ,
As you will login you will get a little pop-up on the screen which says something like "Starting Horde in 5 seconds. Click Stop and then click [ Disable AutoLoad ]" just below Horde sign.
Also please keep in mind whenever you try to Enable AutoLoad please keep autoloading time for a bit long so that you can get time to select.