Why This Rejection Happens
Your Opt-out Confirmation Message (the automated reply to "STOP") does not clearly state who the user has just unsubscribed from.
Root Cause Analysis
The Fix
Add your Brand Name to the beginning or end of the STOP message.
✓ Correct Message
"[Brand Name]: You have successfully unsubscribed and will receive no further messages."
✗ Incorrect Message
"You are unsubscribed." (Too vague)
Validate Your Messages
Ensure all your auto-responses are compliant.
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