Sending to bad addresses wastes credits, triggers bounces, and can damage your domain reputation with mailbox providers.
What email verification checks
A solid verifier looks beyond simple format rules:
- Syntax — is the address shaped correctly?
- DNS / MX — does the domain accept mail?
- SMTP / mailbox signals — can the mailbox receive messages when probing is allowed?
- Risk flags — disposable domains, role accounts, catch-all hosts, full or disabled inboxes
When verification helps most
- Cleaning purchased or scraped lists
- Onboarding signups before welcome sequences
- Protecting cold outreach and product announcements
- Keeping API-driven campaigns healthy at scale
Start with Email Verifier
Paste a single address, upload a sheet, or call the API. You get a clear status and score you can filter and export — so you only send to addresses worth reaching.