You can block messages from a particular sender or domain. The domain is the name following the @ symbol in an e-mail address.
When you block a sender or domain, no e-mail or news message from that sender or domain will arrive in your Inbox or in the news messages you read. E-mail from blocked senders goes directly into your Delete folder. Newsgroup messages from blocked senders are not displayed.
The e-mail address of the sender will appear in the Address box. You can type a different address or domain in the Address box if you wish.