Make room for the other version
Ask what the other person understood before assuming that you are arguing about the same facts. For a message about how to apologize for emailing the wrong recipient, use this factual base: name the post, message, file, audience, and privacy impact as precisely as possible.
Correct the record precisely
Correct only what you can support, acknowledge any real impact, and propose a practical way to prevent repetition. Delete or correct what you control, notify affected people, and preserve evidence needed for a formal response. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Agree on a testable next step
Do not repost the harmful material inside the apology or blame the platform for your choice. Escalate intimate images, impersonation, account compromise, threats, and personal data exposure through platform and legal safety channels. Do not recruit an audience, publish private evidence, or turn a misunderstanding into a campaign about character.