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Version: 0.16

Delivery Notifications

Delivery Status Notifications (DSNs) inform senders about the status of their messages. A DSN is generated by the MTA and delivered to the original sender, communicating whether the message was delivered successfully, delayed, or permanently failed.

Configuration​

DSNs are configured on the DsnReportSettings singleton (found in the WebUI under Settings › MTA › Reports › DSN):

  • fromName: expression returning the name used in the From header of the DSN. Default 'Mail Delivery Subsystem'.
  • fromAddress: expression returning the email address used in the From header. Default 'MAILER-DAEMON@' + system('domain').
  • dkimSignDomain: expression returning the domain whose DKIM signatures sign the DSN. Default system('domain').

Example configuration with explicit address and domain:

{
  "fromName": {"else": "'Mail Delivery Subsystem'"},
  "fromAddress": {"else": "'[email protected]'"},
  "dkimSignDomain": {"else": "'example.org'"}
}