Check email-list risk before you start sending
Classify syntax, domain, MX and supported mailbox signals so obvious invalid addresses can be removed or reviewed before a campaign.
No verifier can guarantee future delivery, inbox placement or 100% mailbox accuracy.
Reduce obvious list problems before they damage sending reputation
Verification can classify syntax, domain, MX and mailbox-level signals, but no verifier can promise that every address will accept mail later.
Syntax checks
Identify malformed addresses before deeper processing.
Domain and MX
Confirm whether the domain publishes mail-exchange records.
Mailbox signals
Use supported SMTP-level responses to classify likely status.
Bulk workflow
Process a file rather than checking every address manually.
Risk categories
Separate valid, invalid, catch-all, unknown and other supported outcomes.
Export results
Use the classifications to decide which records require removal or further review.
Use the verifier below before committing a large file
Verification improves list hygiene; it does not create consent, guarantee delivery or make a purchased list provider-compliant.
Accuracy note: Catch-all domains, temporary failures, greylisting and mailbox-provider protections can prevent a definitive result. Treat “unknown” separately instead of assuming it is valid.
Verification is one part of deliverability
Permission, sender authentication, complaint rates, message relevance and SMTP policy remain essential after cleaning.
Verification helps with
- Malformed addresses
- Domains without mail records
- Many clearly invalid mailboxes
- Segmenting uncertain results
Verification cannot guarantee
- Future mailbox availability
- Inbox placement
- Recipient consent
- SMTP-provider approval
Clean the obvious risks, then protect the whole sending process
Combine verification with recipient consent, authentication, gradual volume and complaint monitoring.