How long do bounce rates stay in ISP memory?

ISP bounce memory affects reputation over time:

Typical memory windows:

Recent sends: Heavily weighted (7-14 days). Medium-term: Significant weight (30 days). Longer-term: Decreasing weight (60-90 days).

Factors affecting duration:

Severity: Major incidents remembered longer. Frequency: Repeated problems extend memory. Volume: High-volume senders tracked more closely.

Recovery implications:

Recent improvement shows quickly. Full recovery takes weeks to months. Consistent good behavior required.

What this means:

One bad send is not permanent. Sustained bad behavior compounds. Recovery possible with patience and discipline.

Reputation memory is like credit history. Bad marks fade over time, but recent behavior matters most.