Email not sending

Diagnose mailbox, queue, verification, suppression, and delivery-log email issues.

6 min readUpdated July 2026

Check these areas

  • Mailbox connection
  • Sender permission
  • Recipient email verification
  • Do-not-email or suppression
  • Email queue and delivery logs
  • Credits or plan gates
Video walkthrough placeholder showing compose error, mailbox integration, email queue, delivery log, and blocked send reason.
Video: Email not sending
Video walkthrough placeholder showing compose error, mailbox integration, email queue, delivery log, and blocked send reason.
Email compose error with recipient, sender, blocked reason, and link to email logs.
Email compose error with recipient, sender, blocked reason, and link to email logs.

Where to look

  • Integrations -> Email mailbox
  • Settings -> Email monitoring
  • Admin -> Email logs
  • Cadence step detail
  • Campaign delivery report

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