Probably Handoff and cross-device application state syncing.
I've disabled Handoff.
Also, why would Handoff be triggered by sending an email rather than composing an email? Mail app uses IMAP for syncing mailboxes.
Why does Mail app contact iCloud when sending a non-iCloud email?
21–30 of 58 posts
Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#22Everyone wearing their tinfoil hat while using Gmail and drive for everything
> while using Gmail and drive for everything
I don't.
Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#23Earlier quoted context omitted.
Figure they do it for three-letter agencies who’re not in my threat model, otherwise I’d have to spend much time busying with… Whonix? Tails? Qubes? And lose/reimplement my Universal Clipboard and AirDrop and iMessage… (so yeah I deserve consequences of my love of convenience) Though the more Apple fails to choose the good soap the more I should worry https://news.ycombinator.com/item?id=49074631
I don't think you have to look far nor hard for a mail-client that doesn't communicate with the developer because you send an email... Universal Clipboard, AirDrop and iMessage - is that really the value add of apple? iMessage... do we really want to encourage that behavior?
> Universal Clipboard, AirDrop and iMessage - is that really the value add of apple? iMessage... do we really want to encourage that behavior?
Er, yes ?
iMessage is awesome.
Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#24One Apple Mail feature nobody here has commented on was called Piano Mover internally. I don’t know the public marketing name. It lets attachments over 10MB in emails be replaced with iCloud hosted file references.
I think every major email hosting provider (that's not a dumb IMAP only platform) has some variant of this.
Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#25Fun activity: install glasswire on windows for a day or 2, set it to prompt you before any connection is allowed, and watch as about 500 different windows components attempt connections with Microsoft as a result of any and every action. And how many onedrive exes randomly fire off throughout the day despite having never once used it. And how onedrive changes its version number every day when it realizes it can’t con…
Pack-in slopware and it's consequences have been a disaster for the desktop operating system duopoly.
Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#26Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#27Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#28It's previous recipients synced over iCloud.
Run this and then send an email to see it: log stream --predicate 'subsystem == "com.apple.cloudkit"' --info --debug
Re: Why does Mail app contact iCloud when sending a non-iCloud email?
#29One Apple Mail feature nobody here has commented on was called Piano Mover internally. I don’t know the public marketing name. It lets attachments over 10MB in emails be replaced with iCloud hosted file references.
the marketing name is "Mail Drop", and it is separate from iCloud mail; though it should only fire if there's a 20mb+ attachment on the email.
cloudd is used by a shit-ton of services though, so I'm not sure how to track it down without better tracing of what actually initiated the call, or the contents of the call.
edit: tomasf nailed it - https://news.ycombinator.com/item?id=49158388