A free MX record lookup that shows which servers take a domain's email, the provider behind them, and what's broken.
5.0(1 rating)Type a domain. See the servers that take its email, in the order senders try them, and the provider behind each.
Your domain
DNS is read from your browser. navid.me fetches only the MTA-STS policy, the BIMI files and the domain's age. Nothing is stored.
This free MX record lookup shows the servers that take a domain's email, in the order sending servers try them, and the provider behind each.
It also reads a null MX, which says a domain takes no email, and the MTA-STS policy that makes senders use encryption.
What is an MX record lookup?
An MX record lookup asks DNS for a domain's MX records: each one names a mail server and a priority, and senders try the lowest number first.
Reading MX records
- Server
- aspmx.l.google.com
- What it means
- Tried first
- Server
- alt1.aspmx.l.google.com
- What it means
- Tried when the first doesn't answer
- Server
- alt3.aspmx.l.google.com
- What it means
- Tried after that
Your email provider gives you the servers to add. google.com itself uses a single one, smtp.google.com.
Common MX problems
- No MX record. Senders fall back to the domain's own address, which usually isn't a mail server, so replies and bounces go nowhere.
- A server with no address. An MX that names a server DNS can't find.
- An IP address as the server. An MX must name a server, not an address.
- A CNAME as the server. MX records mustn't point at an alias (RFC 2181).
The lookup flags each one.
Null MX: a domain that takes no email
A single MX of "0 ." is a null MX (RFC 7505): the domain says it accepts no email. It's the right record for a domain that never gets email, and example.com uses one.
Final thoughts on MX records
MX records decide where replies and bounces to your domain go, so a broken one costs you more than lost email.
Check the rest of your setup with the email deliverability checker.
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MX Record Lookup FAQs
Questions about MX records? Here's what to know.
An MX record lookup shows the mail servers that take a domain's email, their priority and the provider behind them.
An MX record names a mail server that takes email for a domain, with a priority: the lowest number is tried first.
Senders try the MX with the lowest priority number first, and the next ones when it doesn't answer.
A null MX is a single MX of 0 . that says a domain takes no email (RFC 7505).
No, an MX record must name a server, and that server needs its own A or AAAA record.
Yes, the MX record lookup is free, with no sign-up.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
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