On Thu, Apr 22, 2021 at 10:29 AM Ian Evans via dmarc-discuss < dmarc-discuss@dmarc.org> wrote:
> . . .an issue sending emails to a PR firm that uses streamsend/ > campaigner.com for its mailing list. Every time I try to email one of > their employees, I get a dmarc mismatch audit message saying that "A > message claiming to be from you has failed the published DMARC > policy for your domain." > > <elided> > > I'm not sure why an email sent directly from my server is saying that > 216.24.225.10 > is my ip. That's a streamsend server and I'm not sure how they have > injected themselves into the email equation and changed my message body > causing dmarc to fail. > It sounds like they might be routing email to their employees through one of their own list-servs and as a result SPF would fail and it sounds like they are breaking DKIM (maybe by adding a footer?). --Kurt
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