is Verizon a supported SMS provider?
You would need to check with Verizon, if their service can be implemented via HTTP(S)
The link below should provide all details in order to determine if an integration is possible.
Alternatively you could contact your RSA Contact to request an integration via our Professional Services Team.
Verizon's Message+ application currently supports some Advanced Mass Messaging features including typing indicators and reading receipts on select devices. These features are only available when messaging with another customer using an Advanced Messaging capable device and on the Verizon network.