MX Record Checker
Find the mail servers responsible for accepting email on behalf of a domain.
Understanding Mail Exchange (MX) DNS Records
Mail Exchange (MX) records are DNS parameters that define which servers accept incoming email traffic for a domain. When someone sends an email to your address, their server queries your domain's DNS for MX records to establish the connection path.
If a domain has multiple MX records, they are processed using a priority weight system where the lowest number has the highest preference. Use our MX Lookup tool to verify if your primary and backup servers are configured correctly to avoid email bounces and routing loops.
Frequently Asked Questions
What happens if a domain has no MX records?
Receiving mail servers will reject emails or fallback to querying the domain's A record. However, fallback routing is disabled by most modern email networks due to security risks.
How do I configure mail server priority weights?
Assign your primary mail server the lowest number (e.g. 10). If you have secondary backup servers, assign them higher priority numbers (e.g. 20, 30) to handle failover.
How long does it take for MX changes to propagate?
This depends on the TTL value of your records. If the TTL is set to 3600, it can take up to an hour for resolving DNS servers to fetch your new MX records.
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