Yea, but that's if you want to emulate iMessage to the Apple servers in order to send actual iMessages. I think the OP was asking about emulating it to the airplane firewall in order to tunnel through, which could be a lot easier and more useful.
It's unlikely that they're inspecting the packets at a level deep enough to tell what they actually are. More likely that they're just letting you access certain servers for $2.
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Yea, but that's if you want to emulate iMessage to the Apple servers in order to send actual iMessages. I think the OP was asking about emulating it to the airplane firewall in order to tunnel through, which could be a lot easier and more useful.
It's unlikely that they're inspecting the packets at a level deep enough to tell what they actually are. More likely that they're just letting you access certain servers for $2.