What is the Inbox? IncrediSupporter Updated October 26, 2016 08:34 Follow The IncrediMail Inbox is the Main Folder where all your New Messages will be when you receive them, unless you have Protection Center, or Messages Rules set for Incoming Messages. Related articles How do I open IncrediMail? Gmail Account Configuration How to correct an Email Account that does not send/receive? What is the Outbox, and where can I find it? What are IncrediMail's Default Folders? Comments 0 comments Article is closed for comments.