Want to ignore someone? Click the Messages icon , and visit your Friends List. You’ll see the ‘Ignore’ link, click it to ignore the player. You’ll be asked to confirm your action.
Once you have a player ignored you won’t receive any messages to your Inbox from their character.
If you make up, you can add the player as a friend again (re-add them to your list), and you will be able to receive messages from them again.