Read email in Mail on iCloud.com
You can view mail sent to your @icloud.com email address and any aliases in Mail on iCloud.com. If you have iCloud+, you can also view mail sent to your custom email domain addresses.
To view your iCloud Mail on other devices, see Set up iCloud Mail on all your devices.
Note: Custom Email Domain is not available in all countries or regions.
Read an email
In Mail on iCloud.com, tap Inbox in the Mailboxes list.
If you want to see a list of emails in a different mail folder, tap that folder instead. For example, tap Sent to see a list of emails you sent.
Select the email in your email list.
In your email list, emails are labeled with the following icons:
Icon | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 | An email is unread. | ||||||||||
 | An email contains an attachment. See Download email attachments from Mail on iCloud.com. | ||||||||||
 | An email that you replied to. See Reply to or forward email in Mail on iCloud.com. | ||||||||||
 | An email that you forwarded. See Reply to or forward email in Mail on iCloud.com. | ||||||||||
 | An email that you flagged. See Search, filter and flag email in Mail on iCloud.com. | ||||||||||
Check for new emails
Your emails are updated automatically, but you can also manually refresh your emails.
In Mail on iCloud.com, tap
at the top of the Mailboxes list.
Mark an email as unread
In Mail on iCloud.com, tap Edit at the top of the email list, then tap
next to the email or emails you want to mark as unread.Tap Mark at the bottom of the email list, then tap Mark as Unread.
You can mark individual emails in a conversation as unread. Tap 
in the bottom-right corner of the email, then tap Mark as Unread.
Load HTML images automatically
In Mail on iCloud.com, tap
at the top of the Mailboxes list, then choose Settings.In the Privacy & Security tab, deselect Block All Remote Content.
When Block All Remote Content is selected, you need to tap “Load remote content” at the top of an email to view the images.
If you cannot read an email because it is encrypted, open it from one of your trusted devices. See What is a digitally signed and encrypted email?