Tell us what is happening. It checks your domain live and tells you what to fix first.
Test it in order. First, whether mailbox providers can authenticate your mail: SPF, DKIM, DMARC and alignment. Then your sending reputation, then how recipients engage. A score on its own does not tell you the cause. Our free test checks your records live and tells you which step is failing.
Six checks, in this order. It stops at the first one that explains the problem.
Can mailbox providers verify who you are?
What has your sending history taught them?
How do recipients treat your mail?
Is it your message or your setup?
Rarely the only cause, often blamed first.
Is there a sender problem at all?
Authentication goes first because it is the fastest to rule out, not the likeliest cause. On the 56 domains we monitor in Google Postmaster Tools, 51 pass SPF, DKIM and DMARC on 100% of measured Gmail mail on a median day (June to July 2026). Read the full method →
Multiple records, a soft fail, or the 10-lookup limit.
Passing SPF, DKIM and DMARC is not the same as trust.
On a shared IP pool, other senders shape your placement.
Ramping by the calendar instead of by engagement.
A domain can be listed for mail it never sent.
Klaviyo counts mail as delivered even when it lands in spam.
Rather have us handle it? See plans →