Emails stop sending silently
A service starts up fine after a deploy, but one feature — sending notification emails — silently stopped working. No errors in the main request path, no 500s, just no emails going out. The deploy moved the service to a new environment config. You suspect the email integration. Where do you look, and how do you confirm the cause?
What a strong answer looks like
Stop the bleeding first (mitigate), then form hypotheses from real signals. Separate root cause from symptom, communicate status as you go, and close with what prevents a repeat.
0:00 of about 15 min
Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.
Run or narrate your approach, then ask the coach.