Vade for Microsoft 365 - Vade for Microsoft 365 is a top-notch email security solution that is specifically aimed to help MSPs protect their networks from adversaries.
FortiMail - Fortinet Email security is designed to block ransomware, phishing, and other cyber threats seeking entry via incoming email and outgoing messages don’t improperly leak sensitive data.
Libraesva Email Security Gateway - Libraesva Email Security Gateway provides enterprise email protection to assist small to large-sized businesses and enterprises to prevent outside attacks on their network.
Barracuda Email Security Service - Secure Email Gateway
Websense Email Security - Websense Email Security is a powerful email protection tool that helps you strengthen the security of your network.
SonicWALL Email Security Series Appliances - SonicWall Email Security appliances are ideal for organizations that need a dedicated on-premises solution.