Creating new folders in Mail on iPhone?

Question

How can I create new mail folders on the Mail app on the iPhone?

Answer 1

Mailboxes stored locally on your hard drive are not included with the iTunes sync process. No mailboxes and messages are included with the iTunes sync process. The email accounts option under the Info tab for your iPhone sync preferences is for transferring email account settings from your computer to your iPhone only so you don't have to manually create the account with the iPhone's mail client.
With a POP account, the only mailboxes available will be the account's Inbox, Drafts, Sent, and Trash mailboxes. The account's Sent mailbox will not be created until you send a message with the account, and the account's Drafts mailbox will not be created until you save a message as a draft.
Accessing a POP account with the iPhone's mail client is no different from accessing the account with a different email client on your computer, or with an email client on another computer. All mailboxes stored locally on your computer's hard drive with the existing email client being used to access the account will not be available after creating the account with another email client on your computer, or with an email client on another computer. The same applies to the iPhone's mail client. There are no phones in the smart phone category that provide for accessing mailboxes stored locally on your computer's hard drive with the email client used on your computer for accessing the account, and I'm not aware of any phones in the smart phone category that provide for syncing locally stored mailboxes on your computer.
Although a POP account can be accessed with more than one email client, a POP account is designed to be accessed with a single email client only. You can't store sent messages on the server with a POP account, so messages sent with one email client used to access the account will not be available with another email client used to access the account and vice-versa.
An IMAP account is designed to be accessed with more than one email client with all server stored mailboxes for the account available with each email client used to access the account along with all server stored mailboxes kept synchronized with the server. Send a message with the iPhone's mail client with an IMAP account and the sent message will be available in the account's Sent mailbox with the email client used on your computer for accessing the account and vice-versa.
You can also create additional server stored mailboxes with the email client used on your computer for accessing an IMAP account to store received and sent messages by category, and the additional server stored mailboxes created with the email client used on your computer for accessing an IMAP account will be available automatically when accessing the account with the iPhone's mail client, or with another email client used on a different computer for accessing the account, along with all server stored mailboxes kept synchronized with the server automatically with each email client used to access the account.
This is not possible with a POP account.
I access an IMAP account with the email client on my Mac, with the iPhone's mail client, and with Windows Mail on a PC running Vista that I use at work for estimating software that doesn't have a Mac version. All server stored mailboxes with the account are available with each email client that I use to access the account, along with all server stored mailboxes kept synchronized with the server automatically.
Have you ever used a Windows Mobile device to access your POP account? If so, were all mailboxes stored locally on your computer's hard drive with the email client used on your computer available with the Windows Mobile device? Sure you could probably create locally stored mailboxes or folders on a Windows Mobile device to store received and sent messages by category, but all your existing locally stored mailboxes or folders with the email client used on your computer would not be available with the Windows Mobile device with no way to transfer the mailboxes or folders from your computer to the device. Would you also want to throw a brick through Microsoft's corporate office windows because you aren't able to transfer and access all locally stored mailboxes or folders on your computer with your Windows Mobile Device? Probably not, but if the account can be accessed as an IMAP account, you would have access to all mailboxes and folders with the email client on the Windows Mobile device if all mailboxes and folders are stored on the server.