iCloud: Manage junk mail
iCloud automatically identifies most junk mail (spam) sent to your @icloud.com address or its aliases and moves the junk mail to your Junk mail folder. If you receive unwanted mail, you can mark it as junk. Messages marked as junk are displayed with a junk mail icon .
Mark a message as junk
In the message list, select the message that you want to mark as junk.
Drag the message to the Junk folder in the sidebar.
Subsequent email messages from the same sender are automatically marked as junk.
Indicate that an email message isn’t junk
Click the Junk folder in the sidebar.
Select a message, then click the Not Junk button in the top right of the message window.
The message is moved to your Inbox. Subsequent email messages from the same sender are no longer automatically marked as junk.
Delete junk mail
By default, messages in the Junk folder are deleted after 30 days. To free up iCloud storage space, you can delete messages in the Junk folder at any time.
Do any of the following:
In the Junk folder, select the message or messages you want to delete, then click the Move to Trash button in the toolbar.
If you don’t see the Move to Trash button in the toolbar, click the Action pop-up menu in the sidebar, then choose Preferences. In the General pane, deselect “Show Archive icon in the toolbar.”
To select several adjacent messages, click the first one, then Shift-click the last one. To select multiple nonadjacent messages, Command-click them on a Mac or Control-click them on a Windows computer.
Drag the message to the Trash in the sidebar.
Select the message you want to delete, then press the Delete or Backspace key.