What is the Inbox? IncrediSupporter Updated February 13, 2018 07:50 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 What are IncrediMail's Default Folders? How do I open IncrediMail? How to correct an Email Account that does not send/receive? Gmail Account Configuration What is the Outbox, and where can I find it? Comments 0 comments Article is closed for comments.