Create topics via email?

I have enable mailing list mode for this forum, but I'm unsure if it's possible to create new topics via email. I tried to email and got a email response back saying it “didn't work” and there's nothing in #announcements category. Has this feature been disabled?

The mailing list mode seems to be about reading only. According to What is "Mailing List mode"? - support - Discourse Meta it causes a mail to be sent for every post, including your own posts.

It is possible to reply to posts on this forum via email. This is what I did here: Why does Iter<'_, K, V> say "It's in an arbitrary order"? - #6 by rory

This feature was not enabled. I have now enabled it for all categories.