Secure Email Gateway Software

TrustRadius Top Rated for 2023

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Avanan, from Check Point since the August 2021 acquisition, connects security technologies to enterprise cloud applications in order to improve protection of sensitive corporate data and IP. According to the vendor, Avanan's one-click deployment allows customers to deploy a new security…

Microsoft Exchange

Microsoft Exchange is a secure email / messaging gateway with file archiving and encryption / data loss capability, available as a hosted service (Exchange Online) or installed (Exchange Server).

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Avanan, from Check Point since the August 2021 acquisition, connects security technologies to enterprise cloud applications in order to improve protection of sensitive corporate data and IP. According to the vendor, Avanan's one-click deployment allows customers to deploy a new security…

Microsoft Exchange

Microsoft Exchange is a secure email / messaging gateway with file archiving and encryption / data loss capability, available as a hosted service (Exchange Online) or installed (Exchange Server).

Proofpoint Email Protection

Proofpoint Email Protection is available as an on-premise or cloud based solution and blocks unwanted, malicious and impostor emails with granular search capabilities and visibility into all messages. Outbound controls include encryption and data loss prevention, while continuity…

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AppRiver from OpenText

AppRiver from OpenText (formerly from Zix from 2019, which was acquired by OpenText), is a hosted messaging gateway and security platform featuring anti-spam and email encryption / data loss capability.

Mimecast Advanced Email Security

The Mimecast Secure Email Gateway is a messaging security option with anti-spam / anti-malware, data loss prevention, large file send, and other features, from UK company Mimecast.

Webroot Email Security Powered by Zix

Webroot Email Security Powered by Zix (formerly Zix Email Threat Protection) solution provides a suite of productivity, email security, and compliance tools built on a secure, easy-to-manage platform designed to help users meet these challenges. It combines Microsoft 365 services,…

Barracuda Email Security Gateway

Barracuda Email Security Gateway is designed to protect against inbound malware, spam, phishing, and Denial of Service attacks, and ensure that business productivity isn’t impacted by attacks through the email system.

Sophos Email

Sophos Email is presented as Predictive Cloud Email Security Powered by Artificial Intelligence designed to block spam and malware, as well as protect employees and block phishing attempts.

Cisco Secure Email Threat Defense

Cisco Secure Email Threat Defense provides protection against email threats that compromise an organization’s brand and operations. Its advanced threat detection capabilities uncover known, emerging and targeted threats. And it expands the scope of organizations' defenses to detect…

Barracuda Essentials

Barracuda Essentials is an email security platform designed to protect users and businesses from volumetric threats like malware and spam, as well advanced threats like targeted spear phishing and ransomware, and provides email archiving and data protection from corruption and deletion…

Trend Micro Smart Protection Suite, with XGen

Trend Micro offers the Smart Protection Suite with XGen, an endpoint security suite including data loss prevention and mobile device protection. The Smart Prtection Endpoint Suite is the basic edition. The Smart Protection Complete Suite also includes a message security gateway for…


odix - a provider of Enterprise CDR (Content Disarm and Reconstruction), is now offering its own native application for securing Microsoft Office 365 mailboxes. CDR technology is a detection-less method to disarm zero-days and Windows Defender (formerly APT)’s in files, that the…

Trend Micro Worry-Free Services Suite

Trend Micro offers an end-to-end hosted security solution which they call the Worry-Free Business Security suite for midsize and larger enterprises, which provides a wide range of services such as endpoint protection, email encryption, general antivirus and threat detection and prevention,…


RMail is RPost’s software-as-a-service solution that enables business users to track and prove email delivery and encrypt sensitive emails. Available as a MS Outlook add-in and for other popular software platforms, RMail works with any email address without any customization required.…

Trellix Email Security

Trellix Email Security (formerly FireEye Email Security) protects against advanced email attacks that bypass the initial gateway.

Trend Micro Email Security

Trend Micro Email Security stops phishing, ransomware, and BEC attacks, and uses an optimum blend of cross-generational threat techniques, like machine learning, sandbox analysis, data loss prevention (DLP), and other methods to stop email threats. The solution connects with other…


FortiMail is an email messaging security platform, from Fortinet headquartered in Sunnyvale, California.

Zoho Mail

Zoho offers their business email suite, which includes Calendar, Tasks, Notes, and Contacts bundled with an inbox.

Trend Micro InterScan Messaging Security

Trend Micro offers the InterScan Messaging Security secure email gateway with anti-spam, advanced threat & data loss prevention, and encryption capability.

Cisco Cloud Email Security

Cisco's Cloud Email Security platform is a secure email gateway.

Symantec Email

Symantec Email filters unwanted messages and protects users from targeted attacks. The service has self- learning capabilities and Symantec intelligence to deliver highly effective and accurate email security. Encryption and data loss prevention help you control sensitive…

N-able Mail Assure

SolarWinds offers Mail Assure, a cloud-based email security solution designed to help customers stay in control and protect their inbound and outbound email using collective threat intelligence, 24/7 email continuity, and long-term email archiving.

Proofpoint Essentials for Small Business

Proofpoint Essentials provides protection against spam, phishing and other email threats, as well as social media protection, user roles and restrictions, and other protections oriented around the needs of small business.


Twizo is a security authentication platform offering various methods of two factor authentication for enterprises and developers. The vendor offers both FREE and paid solutions. According to the vendor, Twizo makes online security simple through easy integration and a variety of…

SonicWall Email Security Appliances

SonicWall Email Security Appliances are for organizations that need a dedicated on-premises solution. SonicWall’s solution can be deployed as a hardened physical appliance, robust virtual appliance or software application. The multi-layered solution provides comprehensive inbound…

Secure Email Gateway Software TrustMap

TrustMaps are two-dimensional charts that compare products based on trScore and research frequency by prospective buyers. Products must have 10 or more ratings to appear on this TrustMap.

Learn More About Secure Email Gateway Software

What is Secure Email Gateway Software?

Secure email gateway software prevents the transmission of malicious emails that violate company policy or contain malware social engineering attacks, spam or other unwanted emails designed to inflict damage. In this way, Secure Email Gateway software is like a firewall for your email. SEGs were originally intended for on-premise environments but have evolved to better secure cloud email environments as well.

Businesses use secure email gateway software to protect their system from attack, and to lessen opportunities for user error from social engineering attacks. There are many different ways of deploying email gateway software. Some software products are installed directly on the email server, while others are provided as a hardware appliance or virtual hardware appliance. Many secure email gateway products are available as public cloud services.

All Secure Email Gateways prevent attacks from reaching their intended recipients. Many SEG providers also offer data loss prevention capabilities. DLP features prevent leakage of sensitive information in outbound emails. Data loss prevention capabilities allow businesses to more effectively protect against internal threats, including both employees who have been compromised by social engineering attacks or who may themselves be bad actors. DLP is especially crucial when working with sensitive or proprietary information, or when required for regulatory compliance.

Secure Email Gateway Features & Capabilities

Important features include:

  • Data loss protection
  • Email management via real-time dashboards etc.
  • Anti-malware
  • Threat protection
  • Ease of management
  • Customizability
  • Sandboxing to help identify risks
  • End-to-end encryption

Secure Email Gateway Comparison

When comparing different secure email gateways, consider these factors:

  1. Messaging Protection: All secure email gateway software protects businesses from malicious emails, but many secure email gateway options also integrate with messaging servers to protect from social engineering attacks there as well. Consider if your business needs messaging protection when purchasing secure email gateway software.
  2. Archiving: Many secure email gateway software options include archiving features users can use to store important emails. When purchasing a secure email gateway software, consider the storage needs of your organization and select a software that can meet your storage needs.
  3. Reporting Features: Some secure email gateway software includes analytics and reporting features on what sorts of emails users are sending and receiving. If you are looking for analytics features, be sure to choose a secure email gateway software that includes them.
  4. Deployment Options: Is each secure email gateway product deployable as a cloud service, on-premise, or both? Businesses should ideally deploy their SEG where their email services and systems are, so ensure that the SEG can match the email systems being used.

Start a Secure Email Gateway comparison

Pricing Information

Costs vary widely depending on the type of product selected. Public cloud services usually charge a per email fee or other usage fee. Appliance gateways typically charge a flat fee for the appliance plus a subscription fee covering the costs of intelligence information updates. Advanced features like email encryption usually incur additional fees.

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Frequently Asked Questions

What types of attacks do secure email gateway solutions address?

Almost all secure email gateway solutions cover social engineering attacks. Additionally, most secure email gateway software includes malware detection in attachments and spam detection.

What are the best secure email gateway software options?

The highest rated secure email gateway solutions are:

  1. Zix
  2. Proofpoint Email Protection
  3. Microsoft Exchange

Do secure email gateway solutions include email encryption?

Some secure email gateway software offers encryption, though pricing depends on the volume of emails your organization spends. Businesses can expect to pay more for this feature.

Are there free or open source secure email gateway options?

There are some free and open source secure email gateways. Many leading products offer free versions with limited features, while open source options provide their entire source code for free but lack vendor support.