​​An Email Security Gateway, in the context of security and cybersecurity, is a specialized technology or solution designed to protect an organization's email infrastructure from a wide range of email-borne threats and security risks. These gateways act as a filter or intermediary between an organization's email servers and the external email environment, such as the Internet. Their primary purpose is to ensure the confidentiality, integrity, and availability of email communications while also preventing various email-based threats. Key features and functions of an Email Security Gateway include:

Spam and Phishing Protection* Email Security Gateways employ various techniques to filter out unsolicited spam emails and detect phishing attempts. They use heuristics, content analysis, and reputation databases to identify and block suspicious messages.

Malware and Virus Scanning: These gateways scan email attachments and content for malware, viruses, and malicious links. They aim to prevent email-based malware from infiltrating an organization's network.

Content Filtering: Email Security Gateways may include content filtering capabilities to enforce email policies, prevent data leakage, and block emails with inappropriate or malicious content.

Authentication and Encryption: They often support email authentication methods like SPF, DKIM, and DMARC to verify sender authenticity and may provide email encryption to secure sensitive email communications.

Quarantine and Reporting: Suspicious emails are quarantined or flagged for review, reducing the risk of email-based threats. Additionally, these gateways provide detailed reporting and analysis to aid in threat detection and incident response.

Denial-of-Service (DoS) and Distributed Denial-of-Service (DDoS) Protection: Some Email Security Gateways include protection mechanisms to mitigate email-based DoS and DDoS attacks, ensuring email services remain available and performant.

Policy Enforcement: They allow organizations to define and enforce email security policies, including acceptable use policies, attachment restrictions, and email retention policies.

Archiving and Compliance: Some solutions offer email archiving capabilities to help organizations meet compliance requirements and retain email records for legal and regulatory purposes.

By serving as a critical line of defense against email-related threats, Email Security Gateways play a pivotal role in an organization's overall cybersecurity strategy, helping to protect sensitive data, maintain email service availability, and prevent the infiltration of malware and phishing attacks through email communications.

ThreatNG is a comprehensive solution integrating External Attack Surface Management (EASM), Digital Risk Protection (DRP), and Security Ratings, strengthening an organization's Email Security Gateway by bolstering its external digital presence. EASM proactively identifies and mitigates potential email security risks from the external attack surface, ensuring that the Email Security Gateway effectively filters out email-borne threats. DRP continually assesses digital risks, enhancing the gateway's ability to detect and block phishing attempts and malicious emails. Security Ratings provide a comprehensive view of the organization's external security posture, enabling the alignment of Email Security Gateway policies with internal security strategies. This integrated approach fortifies email security, reducing the risk of email-based threats and enhancing overall cybersecurity resilience.