Free tool · live DNS
MX record lookup
See the mail servers of any domain, in order of priority, and which email provider hosts them.
Live DNS lookup over DNS-over-HTTPS. You can also paste an email address.
MX records of popular email providers
| Provider | MX records |
|---|---|
| Google Workspace | smtp.google.com (new) or aspmx.l.google.com and alt1–alt4 |
| Microsoft 365 | yourdomain-com.mail.protection.outlook.com |
| Zoho Mail | mx.zoho.com, mx2.zoho.com, mx3.zoho.com |
| Proton Mail | mail.protonmail.ch, mailsec.protonmail.ch |
| Fastmail | in1-smtp.messagingengine.com, in2-smtp.messagingengine.com |
Settings for 100+ providers are on the email server settings pages.
Check MX records on the command line
dig MX example.com +short
nslookup -type=mx example.com
Frequently asked questions
What is an MX record?
A Mail Exchange record is a DNS entry that names the servers accepting email for a domain. Without one, a domain normally cannot receive email.
What does the MX priority mean?
Senders try the server with the lowest number first and fall back to higher numbers if it does not answer. Servers with the same number share the load.
How long do MX changes take?
Until the old record's TTL (time to live) expires at resolvers, usually minutes to a few hours. The TTL is shown in the result.
What is a null MX?
A single MX record with priority 0 and the host '.' (RFC 7505). It says that the domain does not accept email at all, so senders fail immediately instead of retrying.
Email validation API
Validate emails in your app
emailvalidation.io checks syntax, MX records and the mailbox over SMTP, flags disposable, role and free addresses and returns a quality score, in one request.
Read the docs100 free validations every month. No credit card required.
GET https://api.emailvalidation.io/v1/info?email=name@company.com
{
"email": "support@emailvalidation.io",
"domain": "emailvalidation.io",
"format_valid": true,
"mx_found": true,
"smtp_check": true,
"disposable": false,
"role": true,
"free": false,
"score": 0.64,
"state": "deliverable",
"reason": "valid_mailbox"
}Free email tools
Email validator
Does this mailbox exist?
Email spam checker
Will your email land in spam?
Bulk email validator
Clean a list of up to 50 addresses.
Email syntax checker
Is the address written correctly?
Disposable email checker
Is this a throwaway address?
SPF record checker
Is the SPF record valid?
DMARC record checker
Is the domain protected against spoofing?
DKIM record checker
Is the DKIM key published?
Email server settingsSMTP, IMAP and POP3 for 119 providers.
Disposable email domains9,100+ temporary email domains.