Start with the part that is verifiable
Separate the event you can describe from the motive or reaction you are guessing. For a message about how to apologize for criticizing a coworker publicly, use this factual base: state what went wrong, which task or person was affected, and what is already known about the impact.
Make one answerable request
Give the recipient one concrete question or next step instead of several emotional jobs at once. Correct the error, name the owner of each next step, and provide a dependable update time. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Leave the recipient in control
Do not blame workload, hide material risk, or promise a deadline you cannot meet. Use the required manager, HR, security, or compliance route when confidential data or employee safety is involved. A clear message remains useful even when the answer is no or no answer arrives.