Make the first sentence usable
Lead with the reason for writing so the recipient does not have to decode a long emotional introduction. For a message about how to set rules for using your personal phone at work, use this factual base: describe the request or behavior, its frequency, and the effect on delivery, health, or privacy.
Reduce the work of responding
Offer simple options, a narrow question, or a clear update that can be understood without another conversation. Propose a workable channel, schedule, scope, or escalation route and document the agreement. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Respect the boundary already visible
Do not retaliate, shame a colleague, or refuse essential duties without explaining the operational alternative. Use HR, a representative, occupational health, security, or legal support for harassment, discrimination, threats, or unsafe work. A block, explicit refusal, legal restriction, or safety plan takes priority over the desire to explain more.