> ## Knowledge Base Index
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> Use this file to discover available pages before exploring further.
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# How can we manage opt-outs via an opt-out link?

In some countries, by using a shortcode or virtual sms number, the receiver from the SMS is able to reply back with "STOP" or "UNSUBSCRIBE" to optout.
But in most countries SMS messages are sent one-way so there is no easy reply-back solution available.
Smstools provides an opt-out mechanism via an opt-out URL:

Click on '+ Add opt-out link' and the opt-out link will appear in your message box.

![](https://storage.crisp.chat/users/helpdesk/website/-/7/b/b/7/7bb7f1f7a2418c00/image_18h491n.png)

The receiver can click on the link and opt-out from the sms campaign.
All opt-out users will be added to the opt-out list which you can find in 'Extra', opt-out list. You can also manually add a number to this list with a memo.

If a phone number is on the opt-out list we will not send any new messages anymore to that specific phone number.


![](https://storage.crisp.chat/users/helpdesk/website/-/7/b/b/7/7bb7f1f7a2418c00/image_syo7dx.png)
![](https://storage.crisp.chat/users/helpdesk/website/-/7/b/b/7/7bb7f1f7a2418c00/image_1k1ev49.png)