how do i block an email address on my icloud account?
Go to icloud.com and click on Mail. Click on the Cogwheel icon on the bottom left and click on 'Add a Rule'. In the 'If a message', make sure the top box says 'is from' and then type the address you want to block into the box below. In the 'Then' section click on the dropdown list and select 'Move to Trash'.