Free tool
Email syntax checker
Check that an address is written correctly before you save it. Free, no sign-up.
Enter an address to check it against the format rules. Nothing is sent anywhere.
What it checks
What this tool checks
Three things, every time you run it.
- 01
The @ and domain
One @, a name before it and a real-looking domain after it.
- 02
Characters and spaces
Spaces, double dots and characters that are not allowed.
- 03
Length limits
No more than 64 characters before the @ and 254 in total.
Results
How to read the result
Every result comes with a plain reason.
The address is written correctly. It still needs a mailbox check.
The address cannot receive mail as written.
Checking more than a few?
Upload a CSV and verify every address with all six checks. Start with 200 free credits.
FAQ
Email syntax checker questions
Short answers about this tool.
Still have a question? Talk to us.
Check your list before you send it
Start with 200 free credits. Pay per credit after that.