- December 19, 2023Action Required
New sending domain authentication requirements
TransactionalWhat
Beginning in February 2024, we'll be enforcing new sending domain authentication requirements that you'll need to take action on.
Why
Google and Yahoo recently announced new sending requirements that will go into effect in February 2024. In order to comply, Mailchimp Transactional users will have to update their DKIM records and enact a DMARC policy on any sending domain that might be used. Failure to update your domain’s authentication will result in emails being rejected (not sent) once the change goes live.
Here's how you can get started:
DKIM
Create two CNAME records: one with the name
mte1._domainkey.
yourdomain.com
with the valuedkim1.mandrillapp.com
, and another with the namemte2._domainkey.
yourdomain.com
and the valuedkim2.mandrillapp.com
DMARC
Create and save a TXT record in your DNS with a name of
_dmarc.
yourdomain.com
and a value ofv=DMARC1; p=none
Replace
yourdomain.com
with the domain you're setting up. Some domain hosts automatically addyourdomain.com
after the initial value—contact your domain provider for any specifics.We’ve updated the Mailchimp Transactional app and documentation to include these instructions, and to give you the ability to test these records on your Sending Domains page.