Authenticate Mailchimp for your domain

When Mailchimp sends mail as your domain, receivers check that it is DKIM-signed or SPF-authorized for that domain. Without it, a strict DMARC policy will send that mail to spam or bounce it.

1. Set up Mailchimp

In Mailchimp, open Website → Domains, choose your domain and follow Authenticate: add the k2 and k3 _domainkey CNAME records it shows. Mailchimp does not need an SPF change.

2. Publish a DMARC record (if you don't have one)

Create a TXT record named _dmarc with a monitoring-only policy:

v=DMARC1; p=none; rua=mailto:<your report address>

Reports show whether Mailchimp and your other services pass. Tighten the policy only when they all do.

3. Check it

Need help adding the records? See how at Cloudflare, GoDaddy, Namecheap, Amazon Route 53, Squarespace Domains, Porkbun. Add them where your domain's nameservers point.

DNS changes usually appear within an hour. Then check your domain.