It’s not just that: for email providers, they’re responsible for storing messages that their customer has received. Your server you pay to maintain holds your m

It’s not just that: for email providers, they’re responsible for storing messages that their customer has received. Your server you pay to maintain holds your messages. On iMessage, all messages are stored on Apple’s servers (at least in-transit), even those that would be destined between two Android users communicating via iMessage. At least with email it’s a bit easier to filter out spam, but iMessage is also E2E encrypted so automatic spam detection is much harder.