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Email Validation API
Validate the address before it becomes a record
One call at the point of entry — a signup form, a checkout, a CRM import, a background job. Email Awesome returns a usable status before bad data reaches anything downstream.
What you get back,
and what to do with it
Every call returns a structured status you can act on — accept the record, block it, or hold it for review.
Status
What it means
Typical handling
Valid
Mailbox exists and the server accepted it.
Create the record and continue.
Invalid
Address doesn't exist or the domain can't receive.
Block at the form, or flag on import.
Catch all
Domain accepts anything, so the mailbox can't be confirmed.
Accept but tag for a separate sending policy.
Unknown
No definitive answer — greylisting or rate limiting.
Queue for retry. Never charged.
Bad emails spread fastest in automated systems.
Manual cleanup works when the problem is a list. It fails when email data is moving through forms, products, CRMs, enrichment jobs and reports before anyone has time to inspect it.
Clean after the damage
Bad emails enter through forms, sync into CRMs, trigger automations, reach enrichment jobs and distort reporting. By the time someone notices, the address has touched several systems that now need correction, suppression or manual investigation.
Verify at the point of entry
Products, forms, CRM imports and background jobs check the address before it spreads, then use returned statuses to accept, block, flag, segment or review while the data is still close to the source.
Two modes, two very different integrations
Pick the mode that matches where the address enters. It's the one decision worth getting right before you write any code.
Zapier
When validation belongs in your product
Where it fits
Signup, checkout or any field where a person is waiting for an answer.
Who sets it up
A developer, working against the API reference.
How it runs
In your own code, fast enough to block a form submit.
API
When validation belongs in your product
Where it fits
Signup, checkout or any field where a person is waiting for an answer.
Who sets it up
A developer, working against the API reference.
How it runs
In your own code, fast enough to block a form submit.
Real-time
Blocking call, answer in the response.
Use it where a human is waiting: a signup form, a checkout, an in-product field. Keep a timeout and a fallback so a slow mail server never blocks a conversion.
Asynchronous
Submit and move on
The result arrives by webhook or is retrieved when ready. Use it for CRM imports, enrichment jobs and batch work where nothing is waiting on the answer.
Where teams actually
put the call
Signup and lead forms
Reject typos and disposable addresses at submit, before the record exists. The highest-value placement and the easiest to ship.
CRM imports
Validate on ingest so a purchased list never lands in HubSpot or Pipedrive unchecked. Async fits here.
Background jobs
Re-verify ageing records on a schedule, so the database doesn't decay quietly between campaigns.
Verify where
email data enters
01
Send a request
Submit the email address through the API from the form, product flow, CRM import or background job where the data first appears.
02
Receive the result
Use callback or workflow handling to process the final verification status when the check is complete.
03
Automate the decision
Accept, block, flag, segment or review the address based on the returned status and the rules your system already uses.
FAQs
Questions about the API
Is the API only for developers?
What statuses should my app expect?
Why use async verification?
Where should developers use the API?
What is an email validation API?