This was a question and answer on PadGadget today: (I did not ask the question, but I'd wondered the same thing.)
"Q: My e-mail is of the POP variety. Is there any hope of being able to create folders? This really seems like a simple request.
A: Unfortunately, you need an IMAP account to create folders. With a POP3 mail account, this functionality is not available. POP systems donít support server side folders like IMAP email accounts do, making it impossible for Apple to provide synced folders."
My comment: We are not asking for SYNCED folders, just local storage folders like Outlook, Thunderbird, the old Outlook Express, and any number of other mail programs have provided for decades. Is there any iPad email app that does this? I have not found one.
Yes, I know, this forum is not PadGadget, but the Q and A were directly related an issue of mine, so I posted it here, where more people might see it. Thank you.