synapse:
  admin_token: syt_your_admin_token
  server: https://matrix.your.server
  domain: your.server # i.e. the part after the : in your matrix ID
hosts:
  - register.matrix.your.server
email:
  host: mail.your.server
  port: 587
  username: registrations@your.server
  password: your_password
  tls: true
admin:
  email: admin@your.server