Is there a way or maybe a plugin to allow an admin to put something at the top of the forum with a message that a user can dismiss ?
Your config file looks good, paste output of this command to rule out any user error?
I think this should be fixed in https://github.com/NodeBB/nodebb-plugin-category-notifications/commit/c70e9d2940fd93089951db90a3eb9447439a7871
For the sake of completeness, here is how I solved it.
I'm not very proud of the solution but it works.
In the emailer plugin, I added this bit to mailOptions variable.
Now I need to be very careful not to update the plugin and overwrite the index.js file
Admin > (SETTINGS) User > Default User Settings
sent it again, try checking spam folder, the email its coming from is firstname.lastname@example.org