Verify emails at signup
Fake and mistyped addresses at signup become bounces, wasted onboarding emails and inflated user counts. Check the address the moment it is entered and ask the user to fix it on the spot.
How it works
- 1
Call the API on submit
Send the entered address to the verify endpoint from your server before creating the account.
- 2
Branch on the result
Accept valid addresses, ask the user to correct invalid ones, and show the typo suggestion when one is returned.
- 3
Decide your policy for risky ones
Accept risky addresses with a confirmation email, or refuse disposable ones outright, depending on your product.
Why use MailSure for this
Cleaner database from day one
Preventing bad addresses is cheaper than cleaning them later.
Typo recovery
Many 'invalid' signups are real people who mistyped gmail.com. A suggestion turns them back into users.
Works with WordPress too
Not writing code? The WordPress plugin does this for registration, checkout and popular form plugins.
See how the price compares in the pricing comparison, or try the free email checker first.
Frequently asked questions
- Should I still send a confirmation email?
- Yes. Verification catches addresses that cannot work; a confirmation link proves the person controls the mailbox. Use both for high-value signups.
- How fast is a check?
- Normally a fraction of a second. Build your form so a slow response never blocks the user: accept the address and recheck later if the service is unreachable.
- Can I block disposable addresses?
- Yes. Each result flags disposable domains, and the list covers over 120,000 throwaway services.