Hey everyone, I’m running into a frustrating deliverability puzzle and could use some "second opinions" to show my client.
I manage two different Klaviyo accounts, and both have the exact same technical flaw, but completely different results.
The Setup:
- Both accounts have Branded Sending Domains set up in Klaviyo.
- Crucial Part: Both accounts show "DMARC Record Not Found" on MXToolbox.
- Both show a "Double Signature" in Gmail headers (
d=shared.klaviyomail.comAND their own branded domain). - Client A: Sends 3 email campaigns weekly. High engagement. Every single email lands in the Inbox/Primary tab.
- Client B: Sends only for sales/launches (very inconsistent). Recently, even a tiny blast to 200 people went 60% to Spam.
I’m trying to explain to Client B why they are being punished when Client A is "getting away with it" despite having the same missing DMARC record.
Since it's 2026, Google’s AI is way more aggressive. I think Client A is surviving on "Legacy Trust" because they have a consistent "heartbeat" of sends. Client B has no "heartbeat," so Google is defaulting to a strict technical check. Since there’s no DMARC record, Google is rejecting them as unverified.
Client's Suggestion: The client wants to buy a new domain and use a warming tool like Warmy.
My questions:
- In 2026, is a missing DMARC an automatic "Spam" trigger for low-frequency senders, even if high-frequency senders are still getting through?
- Is a new domain + warmy tool even going to help?
Would love to hear from anyone who has dealt with this "Ghost Sender" vs "Trusted Sender" logic with Google's new filters. Thanks!