When I search for a particular message in Mail.app, using the search field, even when I have the message in sight, Mail cannot find it. But, frustratingly, when I use Spotlight, it is able to find the message.
For example, I'll open a folder with a variety of recipes. I can see all the subjects and I see an email with the subject: "Smoothies". Typing in "Smoothies" into the search field brings up 0 results. But typing in "Smoothies" into Spotlight shows the desired message.
How can I get Mail.app to search correctly?
I'm running Mac OS X 10.11.3.