I made a plugin that does this for one domain: https://github.com/fenwick67/nodebb-plugin-email-domain-filter

There's no admin interface or anything though, it just uses an environment var for configuring the domain ([email protected]). It's not in the package manager but somebody could install it via NPM directly.

I made these plugins, I thought somebody else might want to use them as-is, fork them, etc. Both were tested with 0.9.x. Neither are configurable via ACP so I didn't publish to NPM, but wanted to share anyway:

Profanity filter:

GitHub - fenwick67/nodebb-plugin-profanity-filter: filter out profanity in nodebb posts

filter out profanity in nodebb posts. Contribute to fenwick67/nodebb-plugin-profanity-filter development by creating an account on GitHub.

GitHub (github.com)

Filters out profanity in posts and post titles. Also supports custom word list via environment variable PROFANITY_FILTER.

Email Domain Filter:

GitHub - fenwick67/nodebb-plugin-email-domain-filter: an email domain filter for nodebb - only let users with an @domain.net register

an email domain filter for nodebb - only let users with an @domain.net register - fenwick67/nodebb-plugin-email-domain-filter

GitHub (github.com)

Set env var [email protected] and only let people with an @club.org email address sign up.