Have you deleted Mac mail inbox just like many other Mac users. If you have accidentally deleted a mailbox or any message of the inbox it will disappear without leaving a trace. It you have any problem with your mail account and you have to purposely delete it then all the folders that is inbox, sent, archive will also get deleted with its contents. You must be searching for a way to recover deleted Mac mail inbox. You can use time Machine back up utility which comes inbuilt with the Mac system. It automatically save the changes in the mail account as a back up copy. You can restore deleted Mac mail inbox instantly using it. But sometimes the Time Machine may give error or it was not updated at the time of deletion. Now you have choose another option which is to use Mac data recovery software. It will search your system drive for any data related to deleted Mac mail inbox and show you in the preview window. You can choose the desired file and then restore them at your preferred location.