Composing your campaign to contact lists

When sending SMS via our website or via our API, you can select one or more contact lists as recipients of your messages/campaigns.

Duplicate prevention

One contact (or phone number) can be on one or more lists and you can send messages/campaigns to one or several lists at the same time.

The system will always make sure that on phone number will only receive one message per campaign - even if you are sending to several lists and some of the phone numbers are on more than one of those lists. Duplicates will be eliminated on-the-fly in this case.

If you have any questions, please send an email to support@sms.to