How do user actions (move to inbox, report spam) influence future decisions?

User actions are powerful training signals for mailbox provider algorithms:

Positive signals: Moving from spam to inbox ("not spam"), adding to contacts, creating filters to ensure delivery, replying.

Negative signals: Marking as spam, deleting without opening, unsubscribing via spam button.

These actions update your reputation at the user level and contribute to aggregate sender scoring. Enough negative signals from enough users degrades placement for everyone.

Each recipient votes on your trustworthiness. Enough negative votes and the whole fleet gets flagged.