You need to talk to your host then - they control how your Horde 
install is configured. http://wiki.horde.org/ICantGetMyMail

To be honest with you i'm not sure what i'm using; i just have Horde 
as the default webmail client on my hosting.



I am very sorry if i'm writing this in the wrong area; if you could 
tell me where would be more appropriate i would really appreciate it.



Basically as far as i can tell in the settings for Mail Options > 
Server and Folder Information, it is only possible to set 3 folders 
for IMAP folder subscriptions; Drafts, Trash and Spam.



Do you know if it would ever be possible to add other folders 
(specifically one, for Sent items)?



I ask because when accessing my email through IMAP on, for example, my 
blackberry, and sending email, it does not get stored in the Sent 
folder that i created in Horde, and this is the only reason i can 
think this is happening. (As when i delete messages they appear in the 
Trash folder in Horde).



I think that theoretically it should be possible, as it does so with my Gmail.



Again, if this is in the wrong section, I apologise, and if you could 
shed any light on what i've described i'd really appreciate it!



Thanks,

Andrew

In what way is this *not* currently possible? And are you really using HEAD?

You are able to assign imap folder subscriptions to the Trash, Spam 
and Drafts folders, but not to the Sent Items. Would it be possible to 
include this?

Thanks,

Andrew