Free · 100 checks per day
Bulk email verifier
Paste a list or upload a CSV. We check syntax, domain, MX, disposable-domain risk and role-account risk without sending mail.
Keep your list in one place.
Create a free account to save future uploads and return to their results. Paid plans for larger lists are coming soon.
Create your workspace →What the free bulk checker verifies
Every address is checked for valid structure, a resolvable domain, active MX records, known disposable-email providers, and common role-based local parts such as support@ or billing@.
Why bulk mode does not probe every mailbox
SMTP mailbox probing is slower, often intentionally obscured by receiving providers, and should not be hammered at scale. For a deeper single-address test, use the email deliverability checker.