What Is an Email Risk Score? How to Check and Improve Yours

An email risk score is a letter grade — A through F — that rates how well your domain's email authentication records are configured. It measures four things: your SPF record, your DKIM signature, your DMARC policy, and your MX records. A high score means your emails are authenticated and trusted by receiving servers. A low score means they can be spoofed, blocked, or sent to spam.

What an email risk score measures

Your score is built from four DNS records that work together to prove your emails are legitimate. Each one answers a different question:

• SPF (Sender Policy Framework) — Which IP addresses are allowed to send email from your domain?
• DKIM (DomainKeys Identified Mail) — Can receivers cryptographically verify your email wasn't tampered with in transit?
• DMARC (Domain-based Message Authentication, Reporting, and Conformance) — What should receivers do if SPF or DKIM fails?
• MX (Mail Exchange) — Where should incoming mail for your domain be delivered?

Miss any of these, and your score drops. Get all four right, and you're looking at an A.

Why your email risk score matters

Since February 2024, Google and Yahoo require SPF, DKIM, and DMARC for all bulk senders — anyone sending more than 5,000 emails per day. Microsoft followed in May 2025. As of November 2025, Gmail hard-rejects non-compliant email entirely. Messages that fail authentication don't reach the spam folder — they don't reach the inbox at all.

Your email risk score tells you whether you're compliant before your emails start disappearing. A domain with no DMARC record, or one set to p=none, is sitting on borrowed time. Receivers are already grading your domain on these factors whether you check or not — the score just makes the result visible to you.

What each factor means for your score

SPF: Who can send as you?

Your SPF record lists the mail servers authorized to send email from your domain. Without it, any server can claim to be you. With it, receivers check the sending IP against your list and pass or fail the message.

A common mistake is listing too many includes — include:spf1.example.com include:spf2.example.com include:spf3.example.com — which pushes you past the 10-DNS-lookup limit and causes SPF to fail silently. Keep your SPF record lean. If you use a sending service (Mailchimp, SendGrid, your CRM), add their include once.

DKIM: Is your email signed?

DKIM adds a digital signature to your outgoing mail using a private key on your sending server. The receiver looks up the corresponding public key in your DNS and verifies the signature. If the email was modified in transit, the signature breaks.

No DKIM record, no signature. No signature, and receivers have no way to confirm the email came from you. Most email platforms generate the DKIM record for you — you just publish it in DNS.

DMARC: What happens when authentication fails?

DMARC ties SPF and DKIM together and tells receivers what to do when either one fails. The policy is set in your DMARC record:

• p=none — Monitor only. Receivers send reports but don't act on failures. Your score takes a hit here because you're not enforcing anything.
• p=quarantine — Send failing messages to spam. Better, but not a full lock.
• p=reject — Reject failing messages outright. This is what gets you the full credit on your score.

If you're new to DMARC, start with p=none to collect reports and see what's failing. Once your legitimate mail passes consistently, move to p=quarantine, then p=reject. Jumping straight to reject without monitoring can block your own legitimate email.

MX records: Can people reply to you?

MX records tell the internet where to deliver incoming mail to your domain. If they're missing or misconfigured, replies to your messages bounce — and some receivers use MX validity as a trust signal. A domain that can't receive mail looks suspicious.

How to check your email risk score

You don't need to dig through DNS records manually. Scan your domain free at emailsecuritygrade.com — enter your domain and get an instant A-F grade on your SPF, DKIM, DMARC, and MX records, with a plain-language explanation of anything failing. It runs in your browser using Google's public DNS, so there's nothing to install and no signup.

How to improve a poor score

If your grade is below a B, here's the order to fix things:

1. Publish an SPF record if you don't have one. List only the sending services you actually use. End with -all (not ~all or +all) to enforce the policy.
2. Set up DKIM through your email platform. Most providers (Google Workspace, Microsoft 365, SendGrid, Mailgun) generate the record for you. Publish it in DNS as a TXT record.
3. Publish a DMARC record starting with p=none. Add a rua address so you receive aggregate reports showing which messages pass and fail. Review the reports for a week or two.
4. Move DMARC to p=quarantine once your legitimate mail passes consistently. Then move to p=reject when you're confident.
5. Verify your MX records point to your actual mail provider. Remove any stale or unused MX entries.

Each fix moves you one step closer to an A. The scanner re-checks instantly, so you can verify each change as you make it.

The difference between a good score and good deliverability

A strong email risk score means your authentication records are correct — but authentication alone doesn't guarantee inbox placement. Mailbox providers also weigh sender reputation, engagement (opens, replies, not-marked-as-spam), volume patterns, and content.

If your score is solid but emails still land in spam, the problem is likely reputation, not configuration. That's where a deliverability tool comes in. Products like InboxAlly train mailbox providers to recognize your sending as trusted by simulating positive engagement — opens, reads, replies — across seed accounts. Think of it as reputation rehab for your domain. Fix your records first (the score), then build reputation (the deliverability layer) if inbox placement is still poor.

Check your grade free

Don't guess what's broken — see it. Scan your domain free at emailsecuritygrade.com and get an instant A-F grade on your SPF, DKIM, DMARC, and MX records, with a plain-language fix for anything failing. No signup, no install — it runs in your browser.

If your emails are still landing in spam after fixing the records, a deliverability tool like InboxAlly can train mailbox providers to trust your sending — worth a look once your grade is solid.