I should have been more precise. I meant the process of banning an email address so it can never again spam me. Doesn't work for the worst offenders who forge random source addresses, but usually does for slimy marketing departments.
You have to:
1. click on the email from the inbox
2. click on the three-dot hamburger menu on the far right of the sender line
3. click on the 'Block "Evil Sender"' entry in the popup menu
4. confirm that you do in fact want to stop receiving spam from the spammer by clicking the "Block" button
5. Click the "Move to spam" button in the dialog box that appears
You have to:
1. click on the email from the inbox
2. click on the three-dot hamburger menu on the far right of the sender line
3. click on the 'Block "Evil Sender"' entry in the popup menu
4. confirm that you do in fact want to stop receiving spam from the spammer by clicking the "Block" button
5. Click the "Move to spam" button in the dialog box that appears