If you have a list of contacts who don't want to receive your text messages, Volt allows you to upload them directly into your unsubscribe list.

To do this sign into your Volt Messenger account. Once signed in, head up to the top right and click on account settings.

Once in Account Settings, you should see the option to import your unsubscribe list.

With that list imported, those contacts will only receive your communications if you unsubscribe the contact.