iCloud User Guide
- Welcome
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- Sign in and use iCloud.com
- Customize and use the homepage
- Keynote
- Numbers
- Pages
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- Photos on iCloud.com overview
- View your photos and videos
- Hide your photos and videos
- Use iCloud Shared Photo Library
- Upload and download photos
- Add a title or caption
- Organize photos and videos
- Add photos and videos to Favorites
- Play a slideshow of photos
- Delete and recover photos and videos
- Share photos and videos
- Recover files and information
- Use iCloud on your Windows computer
- Get more help with iCloud
- Legal notices and acknowledgements
- Copyright
Email messages that are digitally signed or encrypted can offer enhanced security. You can send or receive signed and encrypted email in the Mail app on your iPhone, iPad, or Mac.
What is a digitally signed email?
A digital signature verifies the authenticity of an email. In other words, it proves that the email was sent from the address it claims to be sent from and that its contents haven’t been altered. When a message is signed, a signed icon 
is shown next to the sender’s address.
What is an encrypted email?
Encryption offers an even higher level of security than a digital signature. It allows for private communication between the sender and the recipient that can’t be read or accessed by third parties. When an email is encrypted, a lock 
is shown next to the sender’s address.
Note: Some email clients, including the iCloud.com web mail app, may not be able to display encrypted emails.
Send and receive signed and encrypted emails
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