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.

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.

Updated on: 14/01/2026