E-Mail notifications
https://www.gitmemory.com/issue/bigbluebutton/greenlight/878/589527655
Example settings in the SMTP section of .env file:
ALLOW_MAIL_NOTIFICATIONS=true
GREENLIGHT_DOMAIN=ourdomain.com
GREENLIGHT_USE_WEBHOOKS=false
SMTP_SERVER=smtp.ourdomain.com
SMTP_PORT=465
SMTP_DOMAIN=ourdomain.com
SMTP_USERNAME=systemsmtp@ourdomain.com
SMTP_PASSWORD=systemsmtppassword
SMTP_AUTH=plain (also tested ssl or tls)
SMTP_STARTTLS_AUTO=true SMTP_SENDER=bbb@ourdomain.com