Toxicity scores

If it comes to the legend to the toxicity score - it's normally visible when results are presented in the app:

Toxicity Score 1 - those are usually widely circulated email addresses (available on lists for purchase),

Toxicity Score 2 - email addresses present in a publicly available data breach (so they receive more spam),

Toxicity Score 3 - Complainers - people that tend to report spam,

Toxicity Score 4 - Potential spam traps,

Toxicity Score 5 - Known spam traps and known privacy litigators