How do I use the email address checker (syntax + MX)?
- Enter the email address.
- Press Check email.
- Fix typos or ask for another address if the domain cannot receive mail.
Email address checker (syntax + MX): frequently asked questions
Does this prove the mailbox exists?
No. It checks format and that the domain accepts email. Only a confirmation email proves a mailbox exists.
What is an MX record?
A DNS record listing the mail servers that receive email for a domain.
Why check emails before sending?
Bounces hurt your sender reputation, and catching typos at sign-up keeps your list clean.
What is a disposable email?
A temporary inbox service. Sign-ups with them rarely become customers.
Is the address stored?
No. We only look up the domain’s DNS records.
How do I set up email for my own domain?
See our email authentication checker and SPF and DMARC generators, or talk to us about business email.
Why do results differ from another checker?
DNS and web responses are cached for their TTL and may differ by location. Our checks use Cloudflare’s 1.1.1.1 resolver.
Is the email address checker (syntax + mx) free?
Yes. It is free with no sign-up and no usage limits for normal use.
Do you store what I check?
No. The check runs on our server in real time and the result is not stored or shared.
Does it work on my phone?
Yes. The tool works in any modern browser on iPhone, Android, tablet or computer.