---
postfix_instance:
  # The keys are the group names associated with a Postfix role, and the
  # values are the name and group (optional) of the instance dedicated
  # to that role.
  IMAP:    { name: mda,             port: 2526 }
  MX:      { name: mx,  group: mta             }
  out:     { name: out, group: mta, port: 2525 }
  MSA:     { name: msa                         }
  webmail: { name: webmail                     }
  lists:   { name: lists,           port: 2527 }