replyPUSH

Much like WordPress.com’s “Comment Reply via Email”, you can reply to any post you subscribe to.
Integrates with the wonderful <a href="https://wordpress.org/plugins/subscribe2/" title="subscribe2" rel="ugc">subscribe2</a> and <a href="http://replypush.com" title="replyPUSH.com" rel="nofollow ugc">replyPUSH.com</a> service to provide the email reply magic.
It automatically adds notifications for comment posts to keep the conversation flowing 🙂
All the subscriber need do, is reply at the top of their quoted email notification.

Reply By Email

Allows your users to reply to articles / blog posts and comments via email.

daniluk4000

The plugin allows you to isolate the replies of the administration or moderators of a particular color, plugin adding a checkbox to the form of the answer. You can upload your styles in style.css and change the language in .po files.
If you have the ability to translate to your language please contact me on VK or daniluk4000@outlook.com

bbPress – Admin Answers

A small plugin without settings will allow you to customize your answers on the forum in special style.

Reply By Email vs bbPress – Admin Answers