Email Validation for Signup Forms

Keep fake and disposable emails out of your database.

Validate the email field in real time, before the account is created. Block bounces, typos, throwaway addresses and free-trial abuse at the source, in under a second, with one API call.

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What bad signups cost you

Every junk address you accept quietly erodes your metrics and your reputation.

Bounces & blacklisting

Welcome and confirmation emails to dead addresses bounce, dragging down deliverability for every user.

Free-trial abuse

Disposable inboxes let one person spin up endless trial accounts and burn your resources.

Skewed analytics

Fake and mistyped signups inflate vanity numbers and pollute activation and retention data.

One call at submit, three outcomes

Drop a single verification call into your form handler. Branch on the result and you've stopped the problem before a row is ever written.

Catch typos like gmial.com and prompt a correction
Block known disposable and temporary providers
Flag catch-all domains as risky for review
Screen role accounts like info@ and sales@

# on signup submit
res = verify(email)

if res.status == "failed":
    reject("Please enter a real email")
elif res.disposable:
    reject("Disposable emails not allowed")
else:
    create_account(email)  # clean ✓

Decide what happens for each result

You stay in control of the user experience.

passed

Create the account

Deliverable address, let them straight in.

failed

Ask to re-enter

Bounce or typo, prompt a correction instead of losing them.

unknown / disposable

Flag or block

Catch-all or throwaway, review, challenge, or refuse.

Frequently asked questions

Common questions about validating signups.

How do I validate email addresses on a signup form?

Call a real-time verification API when the user submits (or blurs) the email field, and act on the result before creating the account. Email Verifier API returns a passed, failed, unknown or transient status in under a second, so you can accept good addresses, reject bounces, and flag risky ones inline.

How do I block disposable and temporary emails at signup?

Email Verifier API screens every address against known disposable and temporary mail providers as part of its 16-point check, returning a disposable flag you can use to block free-trial abuse and throwaway accounts.

Will real-time validation slow down my signup form?

No. Verification typically completes in under a second, fast enough to run inline as the user submits without a noticeable delay.

Does it catch typos like gmial.com?

Yes. Addresses on misspelled or non-existent mail domains fail the domain and MX checks and come back as failed, so you can prompt the user to correct the address instead of silently losing them to a bounce.

What does it cost to validate signups?

Pay-as-you-go: one credit per check, billed only for Passed and Failed results, credits never expire, no subscription. New accounts get 100 free credits with no card required.