An old email filter quietly hid two weeks of school messages

My daughter's school sends attendance notices, permission forms, lunch updates, and teacher messages through the same email system. For two weeks, the important messages seemed to stop.

They had not stopped. A filter I created months earlier was moving every message containing “automated notification” into a low-priority folder. The school changed its subject format, and the messages I cared about began matching a rule designed for routine receipts.

I found the problem after the teacher mentioned a field-trip form I had never seen. Searching the sender's domain showed nine school messages outside the inbox, including one attendance correction with a deadline.

Deleting the filter immediately would make the messages visible again, but I want to understand what else it controls. I am taking screenshots of the rule, searching for recent matches, and moving only the school messages back first. Then I will narrow the filter to the actual receipt senders it was meant to handle. I will also add the school domain to a clearly labeled folder with notifications instead of assuming the inbox is the only reliable surface.

The technology did exactly what I told it to do, long after I forgot telling it. That is more unsettling than a random glitch because the mistake can repeat quietly.

What is your process for auditing email rules that have outlived their original purpose? Which messages deserve a separate safety net because missing one creates a consequence: school, medical, payroll, utilities, or travel?