Rules in Apple Mail are filters you can use to sort incoming mail into folders.
Go to Mail.
And click Preferences.
Select Rules.
Click Add Rule.
Enter a description.
Choose to sort if any or all the following conditions are met.
Select a condition.
This condition will sort any mail that contains the word Test.
Click plus to add another condition.
Set the action to be taken when the above conditions are met.
The message will be moved to the Support mailbox when the condition is met.
Click OK.
Click Apply to apply the rule to messages in your mailbox.
That’s it! Now you know how to create rules in Apple Mail.