Set Up an ‘All Mail’ Folder in Outlook
To set up a custom Smart Folder that contains all of your email messages:
Customize an ‘All Mail’ Folder With Criteria (Plus Examples)
To customize a Smart Folder so that it contains all of your email messages except those you want to exclude with criteria (for example, to remove junk or old emails):
Go to the Advanced tab.Select the Field dropdown arrow.Select All Mail fields > In Folder.Select the Condition dropdown arrow and choose doesn’t contain.In the Value text box, enter the name of the folder or folders you wish to exclude. For example, enter Junk Email.Select Add to List.
Go to the More Choices tab.Select the Size (kilobytes) drop-down arrow and choose greater than.Enter a value, such as 5000 for around 5 MB.
Go to the Advanced tab.Select the Field drop-down arrow.Select Frequently-used Fields > From.Select the Condition drop-down arrow and choose doesn’t contain.In the Value text box, enter the email address (or part of the address) you want to exclude.Select Add to List.