API: post a new post as “collapsed” post

in some cases discourse can collapse posts (like for admin posts and hidden posts) is this something I can do via the (Web) api too?

I want to reply to a new post (as in https://meta.discourse.org/t/auto-reply-option-for-mail-in-posts/66104) but when viewing it from the web site I don’t need to see that auto reply.

We only collapse deleted posts (which you can do via the API).

yeah but if I delete it it won’t actually send it?

Alternatively, is there a way to get a reply-to email address for a given post (so I can send the mail directly)?