HTTP delivery target #746

maddy should be able to forward messages to an arbitrary HTTP endpoint.

deliver_to http {
  tls_client { ... }
  header Authorization "Bearer ..."
  format rfc822/headers/json/form
  field "body" "{{ header }}" # ???
}

Possible operation modes

message/rfc822 body

• Content-Type is set to message/rfc822.
• The entire message is copied into HTTP body.

message/rfc822-headers

• Content-Type is set to message/rfc822-headers
• Message header is copied into HTTP Body.

JSON

• Content-Type is set to application/json.
• Populated values are defined in configuration.

form-encoded

• Content-Type is set to application/x-www-form-urlencoded
• Populated values are defined in configuration.