Re: Can you turn off sound for Mailbox?
Under Settings / Notifications / Mail / <mail account> you can control what happens - sound, visual alert style, whether or not to show an unread message count on the Mail icon (badging), whether or not to show a preview of the message and whether or not it shows up on your lockscreen notification screen.
Originally Posted by blessed2bamommie
Also under Settings / Sounds you can set a tone when you receive and when you receive new mail. You can set it to any ringtone or alert tone on your phone or set it to NONE.
The two settings (sounds and visual alert style) are independent of each other.