Deliverability calculator
Soft bounce to hard bounce ratio calculator
Compare temporary bounces against permanent failures to spot list and routing issues.
A falling ratio can signal rising address quality problems.
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Citations
- [Suped hard and soft bounce management guide 2025](https://www.suped.com/learn/email-deliverability/what-are-the-best-practices-for-managing-hard-and-soft-bounces-in-daily-email-campaigns)
- [M3AAWG Sender Best Common Practices v3 2015](https://www.m3aawg.org/sites/default/files/doc_files/M3AAWG_Senders_BCP_Ver3-2015-02.pdf)
- [Validity State of Email in 2024 2024](https://www.validity.com/wp-content/uploads/2024/02/The-State-of-Email-in-2024-Keeping-Ahead-of-the-Curve.pdf)