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  • Check inbox connection in Instantly; re-auth if needed
  • Verify SPF/DKIM/DMARC still passing
  • Ensure daily caps not exceeded
    Sending resumes without errors.
  • Pause the affected campaign immediately - Re-validate the last imported leads; remove bad records - Lower daily caps for 72 hours, then resume
    Continuing to send with high bounces hurts deliverability.
    Bounce rate returns below 3% for 3 consecutive days.
  • Reduce daily caps and slow ramp
  • Swap subject/body variant; remove spammy words
  • Verify sending from multiple warmed inboxes
    Open rate improves and spam folder checks decline.

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When to escalate

  • Authentication failing for > 24h
  • Multiple domains hit spam simultaneously
  • Bounce rate > 5% after list cleanup