MX lookup
See which servers receive email for a domain, in the order senders try them, and which provider runs them.
No account required to use this tool.
Reading the answer
- Each MX record is a priority and a mail server. Senders try the lowest number first and move to the next if it doesn't answer.
- Records with the same priority share the load.
- A single record of 0 and a dot is a null MX: the domain receives no email at all.
- No MX records at all means senders fall back to the domain's A record, which usually isn't a mail server.
Every field and accepted value: the MX record explained. Other lookups: TXT record lookup, NS lookup, CNAME lookup, A record lookup.
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OpenFrequently asked questions
How do I find a domain's mail server?
Look up its MX records. Each one names a mail server and a priority; the lowest number is tried first.
Why does my domain have several MX records?
So email still arrives when one server is down. Senders work through them from the lowest priority number up.
Can an MX record point to an IP address?
No. It has to name a host, and that host needs an A or AAAA record. It must not be a CNAME either.
I changed my MX records. Why does email still go to the old server?
Senders cache the old answer for its TTL. Lower the TTL a day before you switch, and keep the old mailbox running until the old TTL has passed.
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