What is the purpose of Mimecast's Secure Messaging feature?

Mimecast's Secure Messaging feature is designed to facilitate secure and encrypted communication between users. The primary purpose of this feature is to ensure that sensitive information shared via email remains protected from unauthorized access and interception. By using encryption, Mimecast allows users to send confidential messages safely, maintaining the privacy and integrity of the information being exchanged. This is particularly important in an environment where data breaches and cyber threats are prevalent, making secure communication essential for safeguarding both personal and organizational data.

In contrast, blocking all incoming emails does not align with the goal of promoting secure communication; rather, it would hinder necessary correspondence. Allowing bulk email sending for newsletters pertains to mass communication rather than secure interactions between individuals. Storing sensitive information securely also does not directly relate to the purpose of the Secure Messaging feature, as that refers more to data storage solutions than to the secure transmission of messages. Thus, the option of facilitating secure and encrypted communication is the clear and correct answer.