MX record presence
Check whether the domain has MX records configured.
Why MX records matter
MX records tell the internet where to deliver email for your domain. Missing, misconfigured or unreachable mail servers can stop incoming mail entirely — even when your website and outbound authentication look fine.
What this lookup checks
One lookup reviews your domain’s mail routing records and email server configuration.
Mail servers
See which servers are responsible for receiving email.
Priority values
Review MX priority order and backup mail servers.
Provider detection
Identify common mail providers such as Google Workspace, Microsoft 365, Zoho, Yandex or hosting mail.
DNS response
Check whether MX records resolve correctly through DNS.
Email routing readiness
Find issues that may prevent the domain from receiving email.
Common MX issues this tool can detect
Find mail routing problems that can affect incoming email delivery.
Missing & invalid records
- No MX records found
- MX points to invalid hosts
- MX points directly to an IP
DNS resolution
- MX host does not resolve
- MX record points to a CNAME
- Unreachable mail server hostname
Priority & routing
- Duplicate MX priorities
- Only backup MX records found
- Unusual priority ordering
Configuration review
- Mail server hostname misconfigured
- Unknown or custom provider
- Provider mismatch after migration
Pair with SPF, DKIM and DMARC for complete email authentication coverage.
How MX lookup works
The checker reads DNS MX records and explains how incoming email is routed.
Enter your domain
We normalize the domain and query published MX records for mail routing.
Query MX records
The tool reads mail exchange records published in DNS for your domain.
Review email routing
See mail servers, priorities, provider hints and possible configuration issues.
When to check MX records
- After changing email providers
- When incoming mail stops working
- Before launching a new domain
- During DNS migration
- After updating mail server hostnames
- Periodic mail routing review
Understanding MX results
Lower priority numbers are tried first. Multiple MX records can provide redundancy or load balancing.
Priority 10 → tried first
Priority 20 → backup
MX found
Mail exchangers are published and hostnames resolve in DNS.
No MX records
Incoming email may not be routable unless a fallback A record is used (uncommon for mail).
Unreachable host
MX hostname does not resolve or points to an invalid target.
Priority conflict
Duplicate priorities or unusual ordering may be intentional load balancing — review with your provider.
MX records control where incoming email is delivered. They do not prove that outbound email authentication is configured.
Email authentication next steps
MX records control incoming email. SPF, DKIM and DMARC help authenticate outbound email and protect your domain reputation.
Preparing MX lookup…
Need help fixing mail routing?
Send us your domain report and we’ll review the issue.
Learn more: MX record guide
MX records show mail routing intent. Reachability and deliverability require separate checks. How we check
Frequently asked questions
An MX record is a DNS record that tells mail servers where to deliver email for a domain.
MX priority controls which mail server is tried first. Lower numbers have higher priority.
Yes. Multiple MX records can provide redundancy or route email through a provider with several mail servers.
If the domain is expected to receive email, missing MX records can be a problem. If the domain does not use email, it may be intentional.
No. MX records should point to hostnames, not directly to IP addresses.