Value
We check the format, not the mailbox or MX. Nothing is sent.
Result
Type a value or load the sample.
Type a value or load the sample.
Structure
How it works
An address has a local part, an @ and a domain with a TLD. We reject spaces, double dots and one-letter TLDs.
Valid format ≠ real inbox. We do not send mail and we do not query DNS.
Local
Before @
No spaces, max 64.
Domain
After @
At least one dot and a 2+ TLD.
Limit
No MX
We cannot see if the box exists.
Important:
Do not treat this as proof that a person owns the address.
Useful notes
- @example.com is reserved for documentation.
- IDN addresses are accepted if the browser normalises them.
- Reloading the page clears the field.