How to measure bounce trends over time?

Measuring bounce trends tracks list health over time:

Metrics to track:

Overall bounce rate (total, hard, soft). Bounce rate by domain/ISP. New hard bounces per period. Soft-to-hard conversion rate.

Time series analysis:

Daily or weekly measurements. Rolling averages for smoothing. Period-over-period comparison. Baseline establishment.

Correlation analysis:

Link to sending volume changes. Connect to new list sources. Associate with campaign types. Relate to authentication changes.

Alerting thresholds:

Deviation from baseline. Absolute rate thresholds. Sudden spikes. Sustained elevation.

Visualization:

Trend charts over time. Heat maps by domain. Comparison dashboards.

Trends reveal the trajectory of list health. A single snapshot tells less than the story over time.