Apple iCloud Mail (@icloud.com): Enable 2FA + Generate App-Specific Password
Complete setup for Apple iCloud Mail (@icloud.com / @me.com / @mac.com) — first enable two-factor authentication (2FA), then generate a 16-char App-Specific Password (xxxx-xxxx-xxxx-xxxx format) at the Apple ID site. Paste it into the Laifaxin password field (not your Apple ID main password).