Direct answer
Remove known bounced, complained and unsubscribed recipients, deduplicate and verify the remaining authorised contacts. Address validation is separate from Resend's domain authentication and sending limits.
More questions and answers
How do I clean SendGrid contacts after bounces?
Export or consult the suppression records first, then verify only eligible addresses. Never reimport a cleaned list in a way that bypasses unsubscribe or bounce suppression.
How do I verify an Amazon SES recipient CSV?
Clean the contact CSV, carry over SES bounce and complaint exclusions, then check address status before sending. SES identity verification for senders is a different concept.
Can a verifier fix SPF or DKIM errors?
No. Verification assesses recipients; SPF, DKIM and DMARC authenticate your sending domain. Troubleshoot those DNS records separately if delivery is failing.
Why are my verified emails rejected by a transactional email API?
A verified recipient can still be rejected due to authentication, policy, account restrictions, throttling or message content. Read the API response and bounce code rather than rerunning every recipient check.
Should I verify password-reset recipients every time?
Not necessarily. A verified status does not establish account ownership. Use confirmation or recovery flows, proper rate limits and your application's normal account security rules.