Email Deliverability Test
One domain, one score. We check SPF, DKIM, DMARC, and MX in a single pass and tell you exactly what's healthy and what's quietly sending your outbound to spam — no email or signup required.
What this test checks
Whether your email reaches the inbox comes down to two things: authentication (does the receiving server trust that the mail is really from you?) and reputation (does it trust your domain and IP?). This test covers the authentication foundation by inspecting the four DNS records every inbox provider looks at.
SPF — authorized senders
Confirms which servers may send for your domain, and that the record stays within the 10 DNS-lookup limit with a meaningful fail policy.
DKIM — cryptographic signature
Confirms your mail is signed and the public key is published. We auto-detect common selectors so you don't need to know yours.
DMARC — policy and reporting
Reads your enforcement policy and checks that aggregate reporting is set up so you can see who's sending as your domain.
MX — can you receive mail?
Confirms your domain has valid mail-exchange records, which receivers also use as a basic legitimacy signal.
From score to inbox
A high score means your authentication is sound — but it's the floor, not the ceiling. Reaching the inbox at scale also takes dedicated domains, gradual warmup, healthy sending volumes, and content that doesn't trip filters. Test a specific message with the email spam checker, or drill into any single record with the SPF, DKIM, and DMARC checkers.
Getting every domain to a 90+ and keeping it there across a sending fleet is the unglamorous work behind outbound that actually lands. It's what we build and manage — see our cold email infrastructure service or read the full deliverability guide.
Frequently asked questions
It's a check of the DNS records that determine whether your email reaches the inbox or the spam folder. This test looks up your SPF, DKIM, DMARC, and MX records in a single pass, validates each one, and combines them into a 0–100 deliverability score with specific issues to fix.
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