The EU has defined a directive that says among other things: whenever you contact a customer via email, SMS, etc. you have to give him (and inform him about) an easy way to opt-out (get dropped off the receiver list). Even if not sending to a EU customer, we always recommend for our customers to do so. The opt-out feature is basically like the "unsubscribe" link that you often find at the bottom of newsletters or emails. provides the ability for customers to allow their recipients to STOP receiving SMS or opt-out of the campaign. This feature does not work for sending to single numbers only Lists.

Recipients have the option to STOP receiving SMS or Unsubscribe. 

Opt-out link

Every account comes with a FREE output through the SMS Editor. Recipients will visit the link and enter their mobile number if they chose to opt-out of the SMS campaign. 

Note: The Opt-out link is only available when sending to a list of contacts. 

1. To enable the Opt-out link, go to your Send editor. 

2. Under New Message, click on Select List. Select the list of contacts you would send your SMS campaign to. 

3. In the message editor, click on Opt-out link.

4. Once the Opt-out link is activated, you can now send your SMS campaign. 

Recipients who opt out through the link will be automatically removed from your next campaigns.

You can receive reports for customers who chose to unsubscribe by turning on the Receive Unsubscription Reports in your Account settings. 

1. Click Settings under Account in the left side panel, then click Notifications

2. Click the radio button beside Receive Unsubscription Reports

3. A message will appear to confirm the changes. 


Users may utilize the Optout Management Feature, you can provide a URL to which all opt-out requests will be forwarded.You may use this to save & process the opt-out information in another platform or other IT systems (e.g. CRM system). 

Default Optout Callback URL

Whenever somebody unsubscribes the number, the JSON load with the following structure will be sent to to the specified URL via POST method:

     "timestamp": unsubscription date,
     "unsubscribed_number": opted-out phone number,
     "source": TollFree number or Optout Link

To enable OptOut Management

1. Click Settings under Account in the left side panel, then click Notifications

2. Click the Optout Management.

3. Enter the Callback URL in the "Default Optout Callback URL:" field > Click "Save"

Please also see Opt-out & Opt-in: subscribe or un-subscribe contacts for more details on the opt-out topic.

Un-/subscription is not a real-time feature. Actions may take up to 24 hours to come into effect. 

If you have any questions, please send us an email at