FAQ
Common questions.
Does verification send an email?
No. SMTP recipient checks stop before the DATA stage and transmit no message body.
Is deliverable a guarantee?
No. It records evidence available during the check. A server can later behave differently.
What uses a credit?
A unique address with valid syntax that requires verification. The preflight analysis shows the estimate before confirmation.
Can I upload any list?
No. You must be authorized to process the data and comply with applicable privacy, messaging, and anti-abuse laws.
Where are files stored?
In private application storage outside public web paths. Owner checks guard download routes.
Why is a result unknown?
Timeouts, temporary refusals, policy blocks, or insufficient evidence can prevent a definitive classification.