DND List Management for SMS Campaigns
Automatically capture opt-outs from inbound replies, maintain a centralized DND list, and skip opted-out contacts across every campaign — keeping your SMS marketing compliant and your sender reputation intact.
The Problem
Ignoring Opt-Outs Destroys Your Reputation
Sending messages to people who have replied STOP is a TCPA violation — and it destroys the trust you've built. Carriers monitor complaint rates and can blacklist your numbers if too many recipients flag your messages as spam after opting out.
Manually tracking opt-outs across thousands of campaign replies is error-prone and impossible to scale. One missed opt-out at the wrong time can result in complaints, carrier filtering, and significant legal risk.
The Solution
Automated DND Capture and Enforcement
NumeraLoop catches every opt-out automatically and enforces the DND list on every outbound message — so you never have to worry about sending to opted-out contacts.
Auto Opt-Out Detection
STOP, UNSUBSCRIBE, CANCEL, END, and QUIT replies are automatically captured from your Twilio number inbox and added to the DND list instantly.
CSV DND Import
Already have an existing opt-out list? Import it as a CSV file to pre-populate your DND list before launching any campaign.
Real-Time Sync
DND entries are checked at send time — not just at campaign start. If a contact opts out mid-campaign, subsequent messages to them are automatically skipped.
Account-Level DND List
One DND list covers your entire account. Opt-outs from any number or campaign protect the contact across all future campaigns.
Skipped Count Reporting
Campaign reports show exactly how many contacts were skipped due to DND status, giving you full visibility into your compliance posture.
Manual DND Addition
Add individual numbers to your DND list manually from the dashboard — useful for contacts who requested opt-out through other channels.
How DND Management Works
Contact Replies STOP
A recipient replies with an opt-out keyword to any of your Twilio numbers connected to NumeraLoop.
Auto-Added to DND
NumeraLoop detects the opt-out keyword via Twilio webhooks and instantly adds the number to your DND list.
Campaign Check
Before every outbound message, the recipient is checked against the DND list in real time.
Skipped Silently
If on DND, the message is skipped and recorded as such in your campaign report. No Twilio credit is charged.
Frequently Asked Questions
How does NumeraLoop handle opt-out keywords?
NumeraLoop automatically detects standard opt-out keywords (STOP, UNSUBSCRIBE, CANCEL, END, QUIT) from inbound SMS replies and adds those numbers to your DND list, preventing future campaign messages.
Can I import an existing DND list via CSV?
Yes. You can upload a CSV file of phone numbers to be added to your DND list in bulk, ensuring contacts who have previously opted out are never messaged again.
Is DND enforced across all campaigns or just one?
DND is enforced at the account level. A number on your DND list will be skipped across all bulk SMS campaigns for that account, not just the campaign where they opted out.
What happens if a DND number is in my contact list?
NumeraLoop checks every recipient against the DND list before sending each message. If a match is found, that recipient is automatically skipped — no message is sent and no Twilio credit is consumed.
Related Use Cases
Keep Your SMS Campaigns Compliant
Automated DND management protects your sender reputation and keeps your campaigns inside TCPA guidelines.
- No credit card required
- 3-day free trial
- Automated opt-out handling