Here is how to block messages from another member:
  1. Click on the mail icon in the main menu.
  2. Find a recent message from the member you want to block. If you can't find one in your Inbox, check your Archived and Spam folders.
  3. Click on the message and you will be taken to the conversation page. It will say "Conversation with" followed by the member's name.
  4. Click on the Block Sender button. It's above "Conversation with...."

When you block a member, they will be unable to send you new messages. You will still be able to see their old messages, as they will remain in your mail folders.