communication delivery_error ai_generated true

550 5.1.1 User unknown / mailbox unavailable

ID: communication/email-bounce-rate-high

Also available as: JSON · Markdown
78%Fix Rate
82%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

High email bounce rate affecting sender reputation.

generic

Workarounds

  1. 90% success Implement email verification on signup and clean lists regularly
  2. 88% success Use double opt-in and monitor bounce rates per campaign

Dead Ends

Common approaches that don't work:

  1. Retry bounced addresses repeatedly 88% fail

    Further damages sender reputation

  2. Remove all email validation 85% fail

    Increases bounce rate