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Email Security Gateway (ESG)

Email security gateways (ESG) prevent the sending and receiving of emails that are either harmful, or contravene company policies. ESGs can quarantine or block emails that contain detected threats (viruses, malware, phishing attempts).

The Data Quadrant is a thorough evaluation and ranking of all software in an individual category to compare platforms across multiple dimensions.

These include:

  • User Satisfaction Rankings
  • Business Value Scores
  • Vendor Capability Comparisons
  • Product Feature Evaluations

The Emotional Footprint is a powerful indicator of overall user sentiment toward the relationship with the vendor, capturing data across five dimensions.

These include:

  • Strategy and Innovation
  • Service Experience
  • Conflict Resolution
  • Product Impact
  • Negotiation and Contract

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Latest Research

Transactional Email Service Gives Retarus a Leg Up on the Competition
June 26, 2020

Retarus, a managed service cloud-based email security platform, is a growing company to watch out for. Since its initiation in 1992, it has quickly expanded its services and global infrastructure to North America, Europe, and APAC countries, owning data centers in the associated areas to process data locally in compliance with regulatory standards.

Author: Michelle Tran (Info-Tech)

Google Sets Limit on How Long It Will Store Some Data
June 26, 2020

In response to criticism over data collection practices, Google is introducing default deletion of location history in its web and application activities for new accounts.

Author: Christine Coz (Info-Tech)

The Changing Face of Email Security: Avanan Goes Beyond the Inbox to Integrate With O365
March 17, 2020

While email security gateways help filter out spam, prevent data loss, and inspect for malicious content, they can be easily bypassed. Avanan has patented an API-based approach that sits inside the collaboration suite environment (such as Office 365) to build a perimeter around individual users.

Author: Michelle Tran (Info-Tech)

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Email Security Gateway (ESG) Products

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Data QuadrantReport

A thorough evaluation and ranking of all software to compare software across every dimension.

Emotional FootprintReport

A detailed and unique report that captures a powerful indicator of overall user feeling toward the vendor and product.


Mimecast Services

Mimecast Secure Email Gateway

Mimecast Secure Email Gateway uses sophisticated, multi-layered detection engines and intelligence to protect email data and employees from malware, spam, advanced threats and zero-day attacks.


Composite Score


CX Score


Emotional Footprint


Likeliness to Recommend