# Opt-out Management & Blacklist Compliance | SMS Deliverer

The Blacklist feature is a critical component for maintaining professional communication standards. It ensures that any recipient who expresses a desire to opt-out is automatically or manually blocked from future campaigns, helping your business comply with global anti-spam regulations like the TCPA and GDPR.

User cases & Benefits

• Automatic Opt-out: Integrate with keywords (e.g., "STOP") to automatically move users to the blacklist.

• Manual Entry: Easily import a list of restricted numbers provided by national Do-Not-Call (DNC) registries.

• Global Protection: Once a number is blacklisted, the system will intercept any outgoing messages to that recipient across all campaigns.

SMS Deliverer allows user to create a blacklist or automatically add a number to blacklist via Auto responder, It will block all numbers in blacklist. Users may go to options window to customize the block settings.