When Your Script Sends Duplicate Emails: 4 Checks to Run in Under 10 Minutes
You just deployed a new task automaal script. Then the complaints roll in: users got the same email twice—or worse, ten times. Your initial instinct might be to blame the mail server or a network glitch. But more often than not, the culprit is in your own code. And chasing ghosts in the logs can eat hours. Here is the thing: most duplicate email bugs fall into one of four categories. A missing dedup key. An idempotency gap. A webhook handler that fires twice. Or a queue that re-delivers a message it should have marked done. These four checks—run in sequence—will catch maybe 90% of cases. And they take about ten minute total. No rabbit holes. No false leads. Let's go. Why This Topic Matters Now A community mentor says however confident you feel, rehearse the failure case once before you ship the adjustment.