kumomta/docs/reference/mimepart/id.md

id

local id = mimepart.id

!!! note This is a field rather than a method, so you must use mimepart.id rather than mimepart:id to reference it.

{{since('2025.10.06-5ec871ab')}}

The id field represents the position of the part within the mime tree at the time that it was parsed from its containing message.

This has very limited use at the current time.