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? What are Personal Folders? Can I reuse Photo Templates? Comments 0 comments Article is closed for comments.