Can DNS outages lead to false bounce spikes?
What happens:
- DNS unavailable or timing out
- Senders cannot resolve MX or authentication records
- Temporary failures accumulate
- Some may convert to bounces after retry expiration
Symptoms:
- Sudden spike in temporary failures
- Failures across many recipients at your domain
- Delivery resumes when DNS recovers
Distinguishing from real bounces:
- Check DNS health during the incident window
- Review bounce codes (DNS-related vs recipient-related)
- Correlate with DNS monitoring alerts
- Monitor DNS availability alongside bounce rates.
Registry office closure causes temporary processing stoppage. Not actual cargo rejection.
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