@a_5mith are you running nodebb on port 80, without that you would need to pass the nodebb port 4567 for the nginx proxy to work, wouldn't it?
Yes. that is correct. We pass in the port (or rather, we specify the proxy_pass value directly
@markus9876 A little bit of both
It is outdated in that as of v1.6.0, you no longer need to use emailer-local to send emails via sendmail or postfix or whatever.
NodeBB has supported emails for discussion replies and mentions for many versions now