Change Junk Mail preferences in Mail on Mac
Use Junk Mail preferences in Mail to change options for turning on the junk mail filter and managing junk mail.
To change these preferences in the Mail app on your Mac, choose Mail > Preferences, then click Junk Mail.
Enable junk mail filtering
Turn Mail’s junk mail filter on or off.
If your email account filters junk mail on the mail server, messages might be moved to the Junk mailbox even when this option isn’t selected.
Mark as junk mail, but leave it in my Inbox
Highlight junk mail with color and leave it in your Inbox.
These messages contain a banner across the top with a button to confirm whether the message is junk. This setting is useful for monitoring what Mail considers junk mail.
Move it to the Junk mailbox
Mail automatically moves messages that it considers junk to the Junk mailbox.
This setting is useful when you’re confident that Mail correctly identifies junk mail and you don’t want those messages in your inbox.
Perform custom actions
Refine the junk mail filter by adding conditions to identify junk mail, and actions such as deleting those messages.
The following types of messages are exempt from junk mail filtering
Don’t filter messages from senders you’ve corresponded with, or who know your full name.
Trust junk mail headers in messages
Use any junk mail detection already present in messages you receive. Mail uses this information to more accurately identify junk mail.
Filter junk mail before applying my rules
Mail runs the junk mail filter before it runs any rules that you created.
This option ensures that all messages, even those that your rules might move out of the Inbox, are evaluated by the junk filter.
Restore the default criteria for identifying junk mail.
Use this option only if Mail no longer handles junk mail as you expect. Resetting the filter deletes everything that Mail has learned from you about junk mail.
Set criteria that messages must meet to be identified as junk mail. This option is available only when you select “Perform custom actions.”