Nice little throwback. My teams are being proactive and gathering information now for projects they might like to take on in the future. In some cases, I want to make notes to include these in future budget planning sessions. Sometimes it’d be useful to link to some specific details, and often that detail is in a specific email message.
The Message-ID header is made exactly for this, and you can view the Message-ID header in Mail.app using these instructions. There’s even an old DF post with an AppleScript snippet to make it easy to extract the Message-ID. I didn’t try that, but I suspect it’ll still work just fine.
Elsewhere on your computer, you can use a message:// prefix followed by the message-ID to link to the specific message and macOS still manages to handle it apporpriately, fifteen years later.
Nice when the simple & useful stuff still works.