When a sender's email address is blocked, what is the outcome when they attempt to send a message?

When a sender's email address is blocked, the outcome is rejection. This means that any email sent by that blocked address will not be accepted by the recipient's mail server. The system will deny the message based on the pre-configured blocking rules, ensuring that the senders considered untrustworthy or unwanted cannot deliver their messages to the user.

Blocking an email address typically serves the purpose of preventing spam or malicious content from entering the recipient's inbox. By implementing such blocking mechanisms, Mimecast enhances email security and user experience, ensuring that the communication channel remains clear of undesirable content.

The actual technical process usually involves the email being dropped or rejected at the server level, which prevents it from reaching the intended mailbox altogether. As a result, the user's inbox remains untainted by unwanted correspondence, maintaining the integrity and security of their email communications.