Slipstick.com:

The Samsung Galaxy is a very popular line of phones, based on the queries I receive from users who are complaining that Outlook is creating a new folder called “Junk” and moving mail sent from their co-workers to the Junk folder. The users don’t have rules set and when the user moves the mail back to the Inbox, it gets moved back to the Junk folder. If they turn off the phone, the mail stays in the Inbox. (That is the first clue that it is not Outlook’s fault.)

Because the folder appears in Outlook after creating the account on the S4, the S4 is responsible for the folder, not Outlook. The S4 is not picking up the server’s junk folder and is creating a junk of it’s own.

That’s just odd.

[H/T The loquacious not Jony Ive]