Reacting is fast. Responding is smart. The difference is about ten seconds of breathing.

Reacting happens before thought arrives, which is useful for a swerving car and terrible for a message that annoyed you. The gap is where the better answer lives, because the first thing your body produces is defence and the second thing is usually the real reply. A few seconds is often all it takes for those two to swap places.

When something lands badly, breathe out and count before answering. Write the angry version somewhere it cannot be sent. Then send the one you would still be comfortable with next week.