The ability to sort the mailboxes (sent, drafts, and other custom mailboxes created under the web server) so that I can re-arrange them freely. For now, I cannot create sub-folders. I would like a main folder of the mail account under which I can create unlimited sub-folders. For example, my main account name is "Work Gmail", it's sub-folders will be like inbox, sent, trash, drafts, custom mailboxes which can have it's own sub-folders i.e. custom mailbox 1, custom mailbox 2, and so on. Give me this freedom and flexibility.