Is iCloud Mail encrypted?
No. Apple can read your iCloud Mail, even with Advanced Data Protection on. Apple says this is because iCloud Mail has to work with the global email system.
Checked on 25 October 2026 against 3 sources.
Made by Secria, which makes Secria Mail. We grade every app by the same rules, our own included. How we check
- Between its own usersApple can read itApple lists iCloud Mail as encrypted in transit and on its servers, with Apple holding the keys.1
- To other servicesApple can read itApple's own mail apps support optional S/MIME, but it only seals a message when you have the other person's certificate.1, 3
- Stored mailboxApple can read itStored mail stays readable to Apple with Advanced Data Protection on, and Apple says it can be handed over under a search warrant.1, 2
- Post-quantumNot yetNo post-quantum protection announced as of 25 October 2026.
- Who holds the keys
- Apple keeps them in its data centers, even if you turn on Advanced Data Protection.
- What Apple can still see
- Your messages and attachments, plus mail logs with senders, recipients and times, which Apple says it keeps for up to 25 days.
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Is iCloud Mail end-to-end encrypted?
No. Apple's iCloud security overview says iCloud Mail does not use end-to-end encryption "because of the need to interoperate with the global email system"1. Mail is encrypted in transit and on Apple's servers, and Apple stores the keys1.
Does Advanced Data Protection encrypt iCloud Mail?
No. Advanced Data Protection raises the number of end-to-end encrypted iCloud data categories to 25, including backups, photos and notes1. iCloud Mail, Contacts and Calendars are not among them, and Apple still holds their keys1.
Apple's guidelines for US law enforcement say the same. With Advanced Data Protection on, email, contacts and calendars may still be provided in response to a search warrant2.
Can Apple read my iCloud email?
Apple holds the keys, so it can1. Apple's law enforcement guidelines also describe mail logs, with the time, date, sender and recipient of messages, kept for up to 25 days2.
To seal a single message, Apple says its own mail apps support optional S/MIME1. Mail locks the message only when it has the recipient's encryption certificate3, so the other person needs S/MIME set up too.
How iCloud Mail compares
Sorted by how many parts are sealed by default, then by how many can be. Ties go A to Z.
Sources
- iCloud data security overview (published 5 January 2026), Apple. Read on 25 Oct 2026.
- Legal Process Guidelines: Government & Law Enforcement within the United States (October 2025), Apple. Read on 25 Oct 2026.
- Apple Platform Security: Digital signing and encryption, Apple. Read on 25 Oct 2026.
Changes to this answer
- First published.