0

There is a mail server (postfix), which has DKIM, SPF and DMARC policies configured.
All of them are PASSED, system works perfect.

As an administrator, I receive these kind of letters everyday:

Subject: Report Domain: mydomain.com, example.com Report-ID

and the content message like this: 

Find attached the DMARC Aggregate Report.

Does my mail server also send reports to other mail servers?
How can I edit content of message?

For example, I want to write:

This DMARC report is generated automatically
it dev
  • 305
  • 1
  • 4
  • 11

1 Answers1

1

There is a mail server (postfix), which has DKIM, SPF and DMARC policies configured.

Being configured to support those protocols can mean two separate things:

  1. The server IP address is added to the domain's SPF list, the email software is signing outbound emails with DKIM, and the domain has a proper DMARC policy set. All this is done so that emails sent by the server can be validated by others; or

  2. The server is configured to validate incoming emails. I.e., to do SPF checks, to verify DKIM signatures, and to apply any DMARC policies configured by a sender's domain owner. Optionally, the server can be configured to generate and send out DMARC report to interested parties.

I'm assuming the latter.

As an administrator, I receive these kind of letters everyday

Those are DMARC report generated by other email servers and sent to you.

Does my mail server also send reports to other mail servers?

As far as I know, no email software does that by default. So unless you configured Postfix to record DMARC check results and send out emails, the answer is no.

How can I edit content of message?

DMARC reports have a specific format. The report itself is a XML file, generated by specialized software, and there's no reason to change that. You should be able to pass parameters to the DMARC report generation tools to change a few values -- for example, your organization name, and domain.

fvsdpl
  • 11
  • 2