Make HubSpot DMARC-compliant
How to authenticate HubSpot as a sender on your domain - so its mail passes SPF, DKIM and DMARC, and you can safely reach enforcement.
Three steps to authenticate HubSpot
HubSpot needs to pass SPF and DKIM, and align with your domain so DMARC passes. Here’s how – confirm the exact values against HubSpot’s current documentation as you go.
How HubSpot authenticates
HubSpot gives you a unique, account-specific include (in the form include:NNNNN.spfNN.hubspotemail.net) in Settings -> Domains. Add THAT exact value to your existing SPF record - there is no generic HubSpot include to copy.
So there’s no SPF include to paste in for HubSpot – DKIM (next step) is what carries DMARC alignment. Hosted SPF still helps keep your overall record under the 10-lookup limit.
No SPF include to add
HubSpot authenticates through the CNAME records you publish during its domain-setup flow – follow Step 2.
Turn on DKIM signing
DKIM cryptographically signs each message so receivers can prove it really came from you and wasn’t tampered with. Publish the two CNAME records shown in HubSpot's domain settings to enable DKIM.
DKIM is what keeps you authenticated even when a message is forwarded – so it’s worth getting right. More on how DKIM works →
- Enable DKIM inside HubSpot
- Publish the DNS records it gives you
- Wait for it to verify, then send a test
Confirm alignment, then enforce
With SPF and DKIM set up, check that HubSpot aligns – that the authenticated domain matches your visible From address. Once every legitimate sender aligns, you can move DMARC to p=reject safely.
DMARCER’s enforcement journey shows you exactly when it’s safe to advance – no guesswork.
Good to know
On Cloudflare, turn off CNAME flattening / proxying for the HubSpot records or they won't validate.
Check you got it right
Look up your records instantly, or run a full free check to confirm HubSpot passes SPF, DKIM and DMARC – and get your score out of 100.
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