Many iPhone users know the basic organization features available in the Mail app, only dragging an email to the left to get a list of options and, from there, sending it to the trash. People may not know that the Mailbox feature can be tinkered with to better organize their mail. Mailboxes are categories such as Unread, Attachments, and Send Later that users can open to narrow down their email search. But you can also create custom Mailboxes to
