I have recently added the DMARC rule for my domain and mail server. The policy is set to none so that I can analyze the effect of DMARC and SPF before enforcing the reject rule. It works well and it allowed me to identify and fix a small problem.
Yesterday I submitted a mail to a google group by using my email address in my domain instead of using my gmail address as I usually do.
This morning I received DMARC feedback reporting a dkim and spf failure for mails apparently emitted by IPs owned by google.
Does it mean that enforcing SPF, DKIM and DMARC will disable the possibility to use a mailing list like google groups ?
As I don't have any contact at google I don't know what they tried to do. Did they try to send my mail as if it was sent by me without dkim ?