A reaction is a reflex. A response has a plan behind it. Take one breath and choose which one to send.

The gap between something happening and what you do about it is where all the choice lives, and a reflex closes that gap to nothing. Reactions are fast and are almost always about the previous five seconds. A response takes account of what you want afterwards, which is rarely the same thing at all.

Build a pause into anything you send while annoyed, even one breath or a walk to the kettle. Write the reply and hold it until the feeling drops. Very little genuinely requires an answer inside the next minute.