Using Search folders
If filters are not flexible enough, or you find yourself performing the same search again and again, consider a search folder.
A search folder looks like a folder, it acts like a search, and you set it up like a filter. While a conventional folder actually contains messages, a search folder is a view of messages that might be in several different folders. The messages it contains are determined on the fly using a set of criteria that you have chosen when setting up the search folder.
Search folders are displayed at the bottom of the mail folder list.
If you have not utilized search folders before, enable Edit ▸ Preferences ▸ Mail Accounts ▸ Search Folders.
Evolution automatically updates the search folder contents when new messages are received or messages are deleted. You can also manually update the search folder either by switching to another folder and then back again, or by right-clicking on the search folder and choosing Refresh.
If you need to find out which physical folder a message displayed in a Search Folder is located in, add the Location column to the message list.