For IPS V5: Automatically processes email bounce notifications and spam complaints from Amazon SES and Sendgrid, keeping your member list deliverable without manual effort. When a hard bounce or spam complaint is received via webhook, the member's email delivery is disabled and their account is flagged as validating — preventing future sends until an admin intervenes. Soft bounces are tracked and escalate to a hard block after repeated failures. Admins can review all blocked members, filter by s