Internal Email Protect

    Insider Risk Protection


    Comprehensive remediation and protection of internal and outbound email

    Stop attacks from spreading rapidly and silently between employees, to your customers, or partners with advanced protections for internal and outbound email with rapid remediation. Mimecast’s Internal Email Protect technology lets you detect email-borne security threats that originate from within your email system and automatically or manually remove malicious content from end-users’ mailboxes post-delivery.

    Insider email threat prevention

    From compromised users whose accounts are being exploited by attackers to employees who engage with malicious links or simply make mistakes, Internal Email Protect provides an additional layer of protection designed to keep you secure.


    Lateral threat detection

    Analysis of internal email containing attachments and URLs and data leak prevention inspections of the content.



    Rechecks delivered files to identify previously unidentified malware and automates removal.


    Simplified administration

    Single console across Mimecast’s email security with search, remediation, and reporting.

    The Challenge

    The challenges of internal email protection

    It’s a common misconception that email-borne attacks come only from the outside. While most attacks do start from the outside, attackers will typically look to land and expand once they are inside an organization. One way to gain this foothold is to use a compromised account or remote access malware to send an internal email as an internal user to spread the attack laterally to others in your organization or even outbound to external contacts.

    In most cases, without their knowledge or understanding, your employees play an integral role in these attacks by sending an attacker’s emails to others in the organization.

    Our Solution

    The Mimecast Solution

    To combat internal email threats, you need to inspect internally generated emails for malicious links, attachments, or for sensitive content, and prevent the spread of attacks or data leaks.

    Organizations also need continuous protection from files delivered through emails that are later determined to be malicious.  Mimecast's Internal Email Protection service - Internal Email Protect enables you to monitor, detect, and remediate threats that have landed internally, or that originate from your email system, whether the emails are destined to other internal users or to external recipients. Key capabilities include:


    Scanning of attachments and URLs for malware and malicious links, as well as content inspection enabled by Data Leak Prevention.


    Detection of lateral movement of attacks via email from one internal user to another.


    Automated remediation of infected or sensitive emails and attachments from employees’ inboxes.


    Manually triggered removal of emails and attachments, and when using the Mimecast Security Agent, saved attachments.


    Identification and blocking of threats or sensitive data attempting to leave an organization.


    Continuous monitoring and re-checking of the status of all previously delivered files with automated alerting and removal.


    Use Mimecasts’ remediation API, to remove emails and attachments from mailboxes and the Mimecast Archive using your chosen orchestration tool.


    A single administration console for easy reporting, configuration, and management.

    Email Security, Cloud Gateway
    Icon_ Gateway.svg

    Email Security,
    Cloud Gateway

    Advanced controls at your fingertips


    World-class email security built for your specific needs

    Email is the top attack vector and demands the strongest possible protection. Get world-class email security efficacy, delivered in the way the best meets your needs with Email Security, Gateway.

    With a broad range of complementary solutions and pre-built API integrations, Email Security, Cloud Gateway works in concert with Mimecast’s extended product suite to bolster security and reduce organizational risk.

    Ready to get started?

    Mimecast provides advanced solutions tailored to fit organizations of all sizes.

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