MX records tell the internet where email for a domain should be delivered. If email is failing, delayed, or going to the wrong server, an MX record lookup is one of the first DNS checks to run.
MX records define the mail servers responsible for receiving email for a domain. They often include priority values so sending systems know which server to try first.
MX lookups are useful when setting up business email, connecting Google Workspace or Microsoft 365, moving to a new mail provider, or troubleshooting inbound email problems.
Look at the mail server hostnames and their priority values. The returned servers should match the provider you intend to use. Incorrect or missing MX records can stop new mail from being received.
Common problems include missing MX records, wrong mail server hostnames, outdated old-provider records, incorrect priorities, and delays after DNS changes.
Once you understand what to look for, run a live check using the tool below.
Launch DNS LookupAn MX record is a DNS record that tells other mail servers where email for your domain should be delivered.
Yes. Incorrect or missing MX records can prevent inbound email from reaching the right mail server.
This page explains the purpose of the check, what results mean, and what problems to watch for before you run the live tool.
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