@piyush try installing with npm after opening a terminal in your nodebb folder.npm install nodebb-plugin-whitelist-email-domains
then go to plugin page and activate it, rebuild and restart.
Is there are any nodebb plugin that can you used for pre-moderation of posts? If pre-moderation is enabled on a category, all the posts within that category will go thru a moderator for approval before being surfaced for viewing to rest of the users?
You can enable the post queue for new users in post settings, but if you want to queue everything in one category you have to turn to plugins.
I actually created one that might help a little: https://github.com/oplik0/nodebb-plugin-category-queue
But because it was created just for my needs it only queues topics and not every new post (if you post something in a topic from that category it won't be queued, but if you create a new topic it will).
It can be easily modified to do that tho (look here for explanation on how to get cid from such a post).