The Smart Mailbox I have set up for Wells Fargo emails has stopped populating since January 2016. Previously it had populated properly since I made it in 2010.
I have since received many Wells Fargo Bill Pay emails – but they don't populate into the Smart Mailbox.
I have created another Smart Mailbox with the same name but with a number one (1) after. It shows exactly the same emails.
Best Answer
What fixed it for me was this procedure, i.e.:
I had only one instance of “mds”. Force-quitting it was enough to instantly solve the problem. Kudos to MacIssues!