When something like that gets edited, the server
(e.g. Lemmy) sends out an Update message.
That contains the whole post/comment but with the
slightly updated content.
This mail system just delivers it the same anyway,
so we end up with some duplicate mail.
Not quite sure how/if Updates should be handled…
I love that someone bothered to downvote this post.
Haha well I should say now: thanks for hosting this Lemmy instance!