Bento

421 4.7.0 [TS02]

TS02 Complaint Rate Deferral

Temporary Deferral

Mail is paused because Yahoo is seeing a spike in spam complaints.

TS02 reflects a trust downgrade driven by recent complaint or unsubscribe activity. Yahoo slows delivery so recipients are not overwhelmed.

Severity

WARNING

Provider

Yahoo Mail

Reference

TS02

Last Reviewed

2025-06-01

How to Fix 421 4.7.0 [TS02]

Follow these steps to resolve this Yahoo Mail SMTP error and restore normal delivery.

  • ✓Suppress unengaged contacts who have not opened in the past 90 days.
  • ✓Verify list acquisition sources and drop any third-party data.
  • ✓Highlight the unsubscribe link and confirm it works within one click.
  • ✓Pause campaigns that triggered the spike until reputation rebounds.

Helpful Resources

More Yahoo Mail SMTP Codes

Keep these related troubleshooting guides handy while addressing 421 4.7.0 [TS02].

421 4.7.0 [TS01] – TS01 New or Cold IP Throttle
Related issue
421 4.7.0 [TSS04] – TSS04 Temporary Deferral
Related issue
421 4.7.0 [TS03] – TS03 Reputation Hold
WARNING
451 – 451 Unresolvable From Domain
WARNING

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