As I understand, we have to use the site to reply to a post. I think it would be a good idea to be able to reply to a post by replying to an email.
Yep, here’s how to do it: https://meta.discourse.org/t/set-up-reply-via-email-support-e-mail/14003 – I haven’t read it yet :).
Update: I tried to set it up… Let’s see if it works :).
I’m sending this by email…
[edit: so it worked!]