---
title: Shield Reviews
meta_title: 'Shield Reviews 2026: Details, Pricing, & Features | G2'
meta_description: Filter reviews by the users' company size, role or industry to find
  out how Shield works for a business like yours.
date_modified: '2026-07-27'
parent_category:
  name: Email Security
  url: https://www.g2.com/categories/email-security
---

# Shield Reviews
**Vendor:** Mailprotector  
**Category:** [Cloud Email Security Solutions](https://www.g2.com/categories/cloud-email-security)
## About Shield
Shield is Mailprotector's zero trust cloud email security product for MSPs that protect Microsoft 365 environments. Its patented architecture combines secure email gateway and API-based mailbox protection as one system that shares context between the edge and the inbox. What Shield learns at the gateway shapes how the message is handled in Microsoft 365, while activity in the mailbox sharpens what Shield does with future messages before delivery. This gives MSPs continuous control across the email lifecycle. Shield gives MSPs gateway enforcement with the deployment simplicity of an API product. It leaves a client's MX, SPF, and DKIM records unchanged, removing DNS work and mail-flow disruption from the equation. Most email filters begin by trusting senders and then try to identify malicious messages. Shield begins with no assumed trust. It builds an initial trust network for each user from existing contacts and communication history. New senders remain outside that network until the user makes a one-click trust or silence decision. Shield learns from every action and gets smarter over time. Key capabilities include: The Heads-Up Display adds color-coded security signals to each message and updates them as risk or trust levels change. X-ray provides a fully isolated message view that explains security findings in plain English, previews link destinations, and records delivery and action history. Email Traffic Control is a point-and-click workflow builder for inbound, outbound, and post-delivery actions. Templates and intelligent data detectors support critical use cases including data loss prevention (DLP), trusted-sender handling and account takeover protection (ATO).






- [View Shield pricing details and edition comparison](https://www.g2.com/products/mailprotector-shield/reviews?section=pricing&secure%5Bexpires_at%5D=2026-07-31+19%3A53%3A50+-0500&secure%5Bsession_id%5D=d18d66d3-dc49-4bc1-a5d3-fec285bc8ea3&secure%5Btoken%5D=5cf69898541a0a9179796d3a13d4e82c4ee41b9909c2886f9fb3fd029667cf2d&format=llm_user)
## Shield Integrations
  - [Microsoft 365](https://www.g2.com/products/microsoft365/reviews)

## Shield Features
**Administration**
- Intelligence Reporting
- Email Integration Suppor
- Access Management
- Data Loss Prevention

**Maintenance**
- Auditing
- Allow and block lists
- Compliance
- Archiving

**Security**
- Anti-Malware/Anti-Spam
- Encryption
- Quarantine
- Advanced Threat Protection (ATP)
- Anti-Phishing
- Account takeover prevention

## Top Shield Alternatives
  - [Acronis Cyber Protect Cloud](https://www.g2.com/products/acronis-cyber-protect-cloud/reviews) - 4.7/5.0 (1,373 reviews)
  - [Paubox](https://www.g2.com/products/paubox/reviews) - 4.9/5.0 (601 reviews)
  - [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) - 4.6/5.0 (589 reviews)