If a spam or phishing message appears in your mailbox, you can block it. Blocking a message applies the configured action (usually moving the message to your spam folder) and reports it to the Cloudmark service, where it is used to prevent similar messages from appearing in the future, for all users in the network.
The message disappears from the message list. If you want to look at it again, you can find it in the spam folder. If you change your mind and want to unblock the message, see Unblocking legitimate messages.