Dynamic senders: automatically use the right SMS sender
Dynamic senders let you send one SMS message to your whole audience from the right number for each person's country. You set up a dynamic sender once, with a sender for each group of countries, and then pick it in any message like you would a phone number.
When you send your message, Customer.io checks each recipient’s phone number and texts them from the sender you picked for their country. For numbers that don’t match any of your country groups, you can set a default sender. You can also choose not to message those numbers at all.