Solution

Block disposable emails

Stop fraud, abuse, and throwaway signups. We detect disposable, temp mail, and suspicious domains.

Disposable database
Domain heuristics
API and bulk

What is disposable email?

A temporary inbox created for minutes or hours to receive an activation link without sharing a real contact address.

Self-serve: create an account, upload a list or connect the API without a sales call.

Product risks

Freemium, trial, and lead magnets attract temp mail at scale. The result: hard bounces, false metrics, limit abuse, and support time spent on accounts that never become customers.

How we detect disposable email

We combine a database of known disposable domains, heuristics (subdomains, naming patterns), and SMTP verification. At signup you can block risky or invalid in the UI or flag for manual review.

Updated temp-mail domain list
Alias and plus-address detection where possible
API returns classification reason, not just yes/no

Blocking at signup

Call POST /api/v1/verify in your signup form. When the address is disposable or invalid, show an inline message before the user continues. Standard fraud protection for SaaS and marketplaces.

Blocking policy

By default we do not block Gmail, Outlook, or other free providers — we flag them for information. You decide whether risky should fail the form or be accepted with a CRM flag.

Email address format

The first filter in every verification. We validate syntax against internet mail standards before running more expensive DNS and SMTP tests.

Why we check this

Invalid syntax is the fastest signal that a record should not be sent to. Typos, missing @ signs, and illegal characters are often rejected before delivery is even attempted.

What you gain

You save credits on deeper tests and immediately see records to fix manually in CSV or CRM. Less noise in your export from the very start of list cleaning.

We detect

invalid format
invalid domain
disallowed characters
RFC compliance errors
addresses that cannot be mailed

Example

jane.doe@gmail.com
jane@@gmail.com
jane.gmail.com

“We cleaned 40k leads before a cold email push. Bounce dropped from 9% to under 1% — domain reputation recovered.”
Marta, B2B SaaSVerified customer

“We upload a CSV from CRM every week. Export with statuses saves hours of manual checking.”
Tomasz, outbound agencyVerified customer

“Trial credits were enough to judge quality. Then we bought a pack for our B2B newsletter.”
Kamil, marketing automationVerified customer

Signup verification Email verifier Verification accuracy

Frequently asked questions

Do you block Gmail?

No. Free providers such as Gmail are flagged for information only and are not blocked by default.

Can I scan an existing list for disposable addresses?

Yes. Upload CSV or use bulk API — export shows risky status with disposable reason.

What about aliases like user+tag@gmail.com?

An alias on a real provider domain usually passes as valid. We block disposable domains, not legitimate provider aliases.