Here's qmailtoaster dkim; although, there is no SMTP checking. It will
have to be patched for that.
On 11/11/2017 9:38 AM, Chris wrote:
I've got a few users on my server that forward their email to gmail,
and sometimes my server accepts email that gmail rejects bounces back
to me. When that happens I try to see if there is something I could
have done better on my server so that I wouldn't have accepted that
email in the first place. Today I had a bounce with the following message:
Remote host said: 550-5.7.1 Unauthenticated email fromaol.com
<http://aol.com/>is not accepted due to domain's
550-5.7.1 DMARC policy. Please contact the administrator ofaol.com
550-5.7.1 this was a legitimate mail. Please visit
550-5.7.1 https://support.google.com/mail/answer/2451690to learn about the
550 5.7.1 DMARC initiative. i6si10846092pgt.798 - gsmtp
Looking at the message and the headers, it was clearly spam with a
forged sender. It's exactly the kind of email I don't want to accept,
let alone forward to another service.
How can I add DMARC policy checking to my filter path, to prevent my
server from accepting this junk in the first place?
White Horse Technical Consulting (WHTC)