Free Email Health Checker
Check your domain's MX records, SPF, DMARC, and DKIM configuration in seconds. Identify email deliverability problems before they cost you.
Check your domain
Enter a domain name (e.g. example.com) to analyse its email DNS configuration.
MX Records
SPF Record
DMARC Record
DKIM Selectors
Mail Server Details
Problems with email delivery?
If your email health score is less than perfect, we can help. Whether you need to migrate to a more reliable provider or set up a dedicated SMTP relay, our team has you covered.
What we check
MX Records
Mail Exchanger records tell the internet which servers handle email for your domain. Without them, no one can send you email.
SPF Record
Sender Policy Framework defines which servers are authorised to send email for your domain. Missing SPF records lead to spam filtering.
DMARC Policy
DMARC tells receiving servers how to handle emails that fail authentication. It protects your domain from spoofing and phishing attacks.
DKIM Signatures
DomainKeys Identified Mail adds a digital signature to your outgoing emails, proving they haven't been tampered with in transit.
Reverse DNS
Reverse DNS (PTR records) maps your mail server's IP address back to a hostname. Many mail servers reject email from IPs without valid rDNS.
Health Score
We combine all checks into a single score: Good, Warning, or Poor, so you can quickly see if your domain needs attention.
Frequently Asked Questions
An MX (Mail Exchanger) record is a DNS record that specifies which mail servers are responsible for receiving email on behalf of your domain. Each MX record has a priority value -- lower numbers indicate higher priority. When someone sends you an email, their mail server looks up your MX records to determine where to deliver the message.
SPF (Sender Policy Framework) is a DNS TXT record that lists which mail servers are authorised to send email on behalf of your domain. Without a valid SPF record, your emails are more likely to be flagged as spam or rejected entirely. It is one of the three key email authentication standards alongside DKIM and DMARC.
DMARC (Domain-based Message Authentication, Reporting and Conformance) is an email authentication policy published as a DNS TXT record at _dmarc.yourdomain.com. It tells receiving mail servers what to do when emails fail SPF or DKIM checks -- such as quarantine, reject, or take no action. DMARC also provides reporting so you can monitor abuse of your domain.
DKIM (DomainKeys Identified Mail) is an email authentication method that uses a digital signature added to outgoing emails. The receiving mail server can verify this signature using a public key published in your DNS. DKIM helps prevent email tampering and spoofing.
The email health score reflects how well your domain's email DNS records are configured. A "Good" score means MX, SPF, and DMARC are all present and correctly configured. A "Warning" score means some records are missing or could be improved. A "Poor" score means critical records like MX or SPF are missing, which can cause serious email delivery problems.
Start by ensuring your domain has valid MX records, an SPF record, a DMARC policy, and DKIM configured. Use this free tool to check your current setup. If you need help migrating to a better email provider or setting up a dedicated SMTP relay, Email Migration Hub offers professional migration services starting from just £29.