With federal inmate texting, messages are relayed using the federal Corrlinks/TRULINCS approach

https://prisontextapp543.rivetgarden.com/posts/how-to-pick-the-best-federal-inmate-text-app-for-secure-communication-2

With federal inmate texting, messages are relayed with the aid of the federal Corrlinks/TRULINCS formulation, and replies can return to the outside user as established text messages.