You are self hosting iMessage – you have a machine you own (mac mini) running the iMessage application 24-7, so you can access it on your own client (Android phone).
It’s self hosting a proprietary service with some middleware to access it on the device of your choosing.
You’re not self-hosting iMessage. It’s just a bridge between your device and Apple’s iMessage network.
You are self hosting iMessage – you have a machine you own (mac mini) running the iMessage application 24-7, so you can access it on your own client (Android phone).
It’s self hosting a proprietary service with some middleware to access it on the device of your choosing.
By that definition, I’m self hosting iMessage on my wife’s iMac. That’s all it is, a bridge.
Is the iMac running as a server? If it is, then sure, that can be self hosting.