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 How to correct an Email Account that does not send/receive? What are IncrediMail's Default Folders? How to download and install IncrediMail What is the Sent Items folder? What is the Outbox, and where can I find it? Comments 0 comments Article is closed for comments.