Help creating new mailbox folders


Hi, I have an evo4g and was wondering if anyone knows how to create new folders within email accounts. I want to create folders to hold specific client emails and have been unable to find a way to create a new folder. All that I have available are the default "Trash" "Sent" "Drafts" and "Outbox".


I feel I must be missing something here, as I cannot create new email folders for either incoming or outgoing mail, as I do on my computer using Thunderbird. I have tried a number of different email programs (K9, EmailEnhanced etc) and none seem to offer this feature. As this seems to me to be fundamental to any email prog, I feel I must be missing something really simple!!! :eek:. I have tried searching, but to no avail.
I have a Desire S running 2.3.3
Any help please?