Lower numbers go first
A server with priority 10 is normally tried before one with priority 20. Equal priorities can be used to distribute delivery attempts.
Incoming mail
Free MX record lookup.
When someone sends to you, public MX records tell their mail server where to deliver the message. Look up those destinations and their order, especially after moving your inboxes to a new provider.
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This is a public DNS snapshot. It does not test real message authentication, mailbox availability or inbox placement.
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Your next email addresshello@yourbusiness.com
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Your new inbox is empty. Is mail going somewhere else?
You set up mailboxes with a new provider, but messages still arrive in the old account. The public MX record may still direct senders to the old service. This lookup shows those routes without touching a mailbox.
What should I look for?
The lowest-priority MX destination still belongs to your previous mail provider.
Compare the destinations with your new provider’s instructions. Make changes at the DNS host, then allow time for existing DNS caches to expire.
Each MX destination has a priority number: lower numbers are generally tried first. Finding a route does not prove the destination is online or that an individual mailbox exists.
Read your mail routes at a glance.
An MX record contains a priority and a destination hostname. The destination should match the instructions from your email provider.
A route is not a mailbox test
Finding an MX record does not prove a server is reachable or a particular mailbox exists. This tool performs DNS lookups only and never connects to a mail server.
Know what null MX means
A record of 0 . explicitly states that the domain does not accept email. It is different from having no MX, where an A/AAAA fallback may be attempted by senders.
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How to look up MX records and find your email host
See the destinations senders use when they deliver mail to your domain, especially after a provider move.
Look up MXEnter the domain after the @ sign
For hello@example.com, enter example.com in the MX lookup. The report shows receiving server hostnames and their priorities. These are public delivery instructions, so no inbox password or account access is needed.
10 mail1.example.com 20 mail2.example.com
Illustrative MX priorities and hostnames. Publish the destinations supplied by your email host.
Read the priority numbers
Lower MX preference numbers are normally tried first. In the example below, a sender would generally try mail1 before mail2. Servers with the same preference can share delivery attempts. A higher-numbered destination may provide a backup route, depending on the provider’s setup.
Compare the complete set of results with your email host’s instructions. A hostname may belong to a provider’s infrastructure without looking like its consumer brand, so do not identify a provider from its name alone.
Know what a missing result means
A null MX record, written as 0 followed by a dot, explicitly states that the domain does not accept email. No MX record is different: senders may try an A or AAAA address as a fallback. Neither case proves that an individual mailbox exists.
If your new inbox is empty after a move, check whether MX still points to the old host and whether cached answers have expired. This DNS lookup does not connect to the destination over SMTP, test server uptime or verify mailbox delivery. Use your provider’s mail logs for those questions.
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More from TrekMail
An inbox is just the beginning.
Read your business email in TrekMail webmail, or connect your favorite email app. Explore the other products when you need more from your workspace.
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Email verifierCheck individual email addresses before you use them.Explore email verifier
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AI agent emailGive your workflows an inbox they can work with.Explore AI agent email
White LabelOffer a branded email experience to your customers.Explore White Label
Good questions. Clear answers.
Questions about incoming mail
Find the details you need, then return to the tool when you’re ready.
Look up MXCan MX records authorize outgoing email?
No. MX records route incoming email. SPF, DKIM and DMARC have separate roles in authenticating outgoing messages.
Can I keep two email providers in MX?
Do not treat MX priorities as a way to split mailboxes between unrelated providers. Unless you have deliberately configured routing, a fallback provider may not know your recipients. Follow your migration plan and provider instructions.
Why do I still see my old mail provider?
DNS caches may retain an old answer until its TTL expires. We cache positive answers for up to five minutes; authoritative changes may take longer to reach all resolvers.
How do I find out who hosts email for a domain?
Look up its MX records and compare the receiving hostnames with the provider’s documentation. Hostnames are a useful clue, but branding and outsourced infrastructure can make them ambiguous.
Is an MX record the same as an A record?
No. An MX record identifies a mail destination and a priority. An A record maps a hostname to an IPv4 address. They perform different jobs in DNS.
Try another free email tool.
Choose a check, enter your domain and get a result. Or generate a new password in your browser. Every tool is free to use, with no account needed.
Free toolEmail domain checker
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Check that your email provider’s public signing key is available.
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Free toolDMARC record checker
Find out how your domain asks receivers to handle messages that fail checks.
Check DMARC
Free toolSecure password generator
Choose a length and characters, then generate and copy a fresh password.
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