How to add a mailbox to my iphone

- How to add a new mailbox to my iphone
- How to add a shared mailbox to my iphone
- How to add another mailbox to my iphone
- How do i add a mailbox to my iphone
- How can i add a mailbox to my iphone
- How do i add a new mailbox to my iphone
- How do i add a gmail mailbox to my iphone
- How do i add a shared mailbox to my iphone
- How do i add another mailbox to my iphone
- Add email to iphone
- Mail iphone add account