It would be very useful to be able to copy a deep link to a specific email. When this link gets opened, thunderbird should, if it has not yet been launched, launch and directly display the linked email. This could be done using a custom url protocol such as `thunderbird://open/<email-id>`. Those links should ideally work on multiple computers, as long as the specified email is in the mailbox.
- Many people create notes in some kind of note taking app like obsidian, which supports external links. When writing notes, it can be very useful to link directly to an email, without having to take a screenshot or copying the whole email into the note.
- Other apps like todo lists, calendars and similar can store links, and people might want to link to emails that contain context to the todo item or calendar event.