554 5.7.1 [TS06]
TS06 Sender Reputation Block
Yahoo blocked the message because the sender reputation remains too low.
TS06 is typically issued after repeated TS02 or TS03 warnings. Yahoo expects proof that complaint and bounce levels are under control.
Severity
ERROR
Provider
Yahoo Mail
Reference
TS06
Last Reviewed
2025-06-01
How to Fix 554 5.7.1 [TS06]
Follow these steps to resolve this Yahoo Mail SMTP error and restore normal delivery.
- ✓Pause Yahoo sends and tackle complaint, bounce, and trap metrics.
- ✓Ensure no secondary systems or compromised accounts are sending mail.
- ✓Share remediation steps with Yahoo before requesting reinstatement.
- ✓Reintroduce traffic with a small, high-engagement cohort once cleared.
Helpful Resources
More Yahoo Mail SMTP Codes
Keep these related troubleshooting guides handy while addressing 554 5.7.1 [TS06].
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