Our emails can be improved. Entering publichappinessmovement.com and brightertomorrowmap.com into https://www.mail-tester.com/ brings up their scores and where we can improve the scores.
By default discourse will send from the discourse host name. You can edit a line near the end of app.yml to change it and it looks like it needs to be changed.
Our DKIM looks like it needs to be set too.