communication config_error ai_generated true

550 5.7.1 Relay access denied

ID: communication/smtp-relay-rejected

Also available as: JSON · Markdown
82%Fix Rate
86%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

SMTP server rejected relay attempt.

generic

Workarounds

  1. 90% success Authenticate before sending: enable SMTP AUTH
  2. 88% success Configure allowed relay domains in SMTP server config

Dead Ends

Common approaches that don't work:

  1. Open relay for all senders 92% fail

    Spam relay abuse

  2. Send from localhost without auth 75% fail

    Only works for local delivery