Does Postmatic work with sites that use threaded commenting?
Yes, threaded commenting is fully supported. Subscribed users will receive notifications of new top-level comments and can reply directly from email. Users will also receive notifications of threaded replies to their own comments and will be able to reply by email.
To turn it on, there’s not much you need to do. Postmatic will follow the lead of what you have already defined for your blog in Settings > Discussion. Turn on threaded commenting there and we’ll do the rest.