My company has two separate Google Workspace accounts, each associated with a separate domain (lets call them
Employees have email addresses assigned to them for both domains.
bob@domainB.com a calendar invite, and
bob@domainB.com replies to that calendar invite email through the Gmail web client, he receives an auto-response saying:
Your message to
alice@domainA.comhas been blocked. See technical details below for more information.
The response was:
Unauthenticated email from
domainB.comis not accepted due to domain's DMARC policy. Please contact the administrator of
domainB.comdomain if this was a legitimate mail. Please visit https://support.google.com/mail/answer/2451690 to learn about the DMARC initiative.
I've read the information at the link provided, which suggests that we need to create and publish a DMARC policy. However, given that these are both Google Workspace accounts, it seems like there would be a simpler solution –– and preferably one with a smaller blast radius than broadly changing our email authentication logic.
Is there a simple solution I'm missing, before I go down this rabbit hole?