How to avoid removing addresses due to false bounces?

Avoiding false suppression preserves valid subscribers:

Conservative classification:

Default to soft when uncertain. Require clear hard bounce signals. Do not trust single ambiguous response.

Threshold protection:

Require multiple failures before suppression. Track over time, not single incidents. Allow recovery between failures.

Verification layers:

Cross-reference with recent engagement. Check if address delivered recently. Manual review for high-value addresses.

Pattern monitoring:

Alert on unusual suppression spikes. Review when entire domains bounce. Investigate sudden changes in bounce rates.

Recovery mechanisms:

Maintain unsuppression capability. Audit suppression decisions. Allow subscriber to contest and reactivate.

False suppression loses customers. Build in safeguards against hasty decisions.