Discourse Emails not threaded properly in some Email clients

Hi @riking ,
Could you describe how to create the situation where a post is referring to posts both above and below it? I did some stuffing around in our discourse install and couldn’t replicate that behaviour.

To answer your question: In-Reply-To should point to the previous post made IF the current post quotes it, or the OP if it doesn’t.

On this subject, I’ve seen [topic reply] @codinghorror comment that “All topic replies are conceptually “in reply to” the topic, though.” which he has repeated in [always topic] and recently in [flat replies] - its definitely the established view!

[topic reply]

[always topic]

[flat replies]

While true to an extent, when discourse is being used as a mailing list replacement the expectation that posts are linear is no longer true and it would be good for the headers to support that use case.
They almost do now!

thanks,