Check who should receive the message
Confirm that you have the right person, the right role, and permission to disclose the information involved. For a message about how to reconnect with a conference contact, use this factual base: remind the person where you worked together, when, and what current topic makes the contact relevant.
Separate information from interpretation
Label confirmed facts, open questions, and the specific decision that belongs to the recipient. Make one modest request and give enough information for them to decline or redirect it. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Use formal help when stakes rise
Do not imply endorsement, exploit a former hierarchy, or send confidential material from the old relationship. Use official business, privacy, conflict, and procurement rules when commercial or regulated information is involved. Medical, legal, financial, employment, and safety decisions may require a qualified professional rather than personal persuasion.