Ian Evans:
> I'm a reviewer and sent an email from my site responding to one of their
> coverage requests.
>
> A few minutes later, my postmaster acct received this message:
>
> A message claiming to be from you has failed the published DMARC
> policy for your domain.
>
> Sender Domain: digitalhit.com
> Sender IP Address: 216.24.225.10
> Received Date: Mon, 27 Jul 2020 15:14:35 -0400
> SPF Alignment: no
> DKIM Alignment: no
> DMARC Results: Quarantine
>
> Followed by:
> ------ This is a copy of the headers that were received before the error
> was detected.
>
> X-DKIM-Failure: bodyhash_mismatch
> Received: from mail.cp20.com ([216.24.225.10])
> by semfq01.mfg.siteprotect.com with esmtps
> (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256)
Other than the time, was any information in the header even remotely
related to the message that you were sending?
If it is not your email message, then the question is why cp20
was sending email on behalf of your domain?
It may be worthwhile to look up Postfix's logging for the outbound
delivery of your message. The logging with "status=sent" contains
the name and IP address of the server that Postfix gave the message
to, plus some remote message identfier in the remote SMTP server's
response.
Wietse
