Why does Mail app contact iCloud when sending a non-iCloud email?
Summary
A tech blogger investigates why Apple's Mail app reaches out to iCloud even when using non-iCloud accounts. The post documents observed connections to gateway.icloud.com from cloudd and nsurlsessiond, notes certificate pinning prevents traffic inspection, and questions what data might be queried or stored in CloudKit. It ends with a stance on blocking these connections for testing purposes and raises broader privacy implications.