I know I have asked this before and others as well. I've been told that RC doesn't support filesystem functions and uses iMAP, I still don't understand they RC can't do this.
I have a lot of users coming from SquirrelMail which has this ability.
I located a patch that works on all versions of RC that I've looked at that actually works.
With the patch, a user can add a folder with an / ending it which then creates a mail directory and then you can add sub-folders in it, Like:
And after you add subfolders to it...
With this I could finally scrap SquirrelMail completely and get it off the servers.
Why are RC developers are not adding something like it to the new versions. It is clearly a desired feature.