Hey mark grantspass,
If you're using iCloud email, you can set up rules to filter out your emails. To do this, check out the steps from this user guide: Set up rules to filter email in Mail on iCloud.com - Apple Support
Set up rules to filter email
1. In Mail on iCloud.com, click
at the top of the Mailboxes list, then choose Preferences.
2. Click Rules, then click “Add rule.”
3. Below “If a message,” use the pop-up menu and text field to specify the type of messages you want to filter.
4. Below Then, use the pop-up menus or fields to specify an action for the rule.
5. Click Add.
6. You can have up to 500 rules.
Important: If you apply rules to a folder and then delete the folder or change its name, make sure to update the rules for those folders accordingly. For example, you can’t forward messages to a deleted folder.
If you're using a different email server other than iCloud, we recommend that you get in touch with your email service provider for the next best steps.
We hope this helps!
Best regards.