Trellix Email Security Alternatives: Top 10 Secure Email Gateway Software in 2025

SolarWinds Spam Experts offers professional anti-spam email filtering and archiving for Web hosting providers, Internet Service Providers and Telcos.

SonicWall Email Security is ideal 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 and outbound protection, and defends against advanced email-borne threats such as ransomware, zero-day threats, spear phishing and business email compromise (BEC).

Fast interception of any content-borne attack across all collaboration channels including email, cloud storage, CRM apps, and messaging platforms. We prevent phishing, BEC, spam, malware, Zero-days, and N-days well before they reach your end-users. Replace your complex existing security stack – including AVs, sandboxes, and CDRs – with one solution against APTs, phishing, malware, BEC, impersonation attacks, and spam. 7 layers of next-gen static and dynamic engines prevent malicious files, URLs, and social-engineering based techniques.

Clearswift offers the industry's most effective layer of real-time email inspection to detect and completely sanitize evasive threats. Advanced Threat Protection protects against zero-hour and malware evading AV scans. Anti-spam and Phishing: Prevent SPAM and phishing emails initiating an attack. Adaptive Data Loss Prevention (A-DLP) Protect critical information with industry's game-changing Adaptive DLP technology for email.

Ultra-modern multi-layered email security for your entire organisation from known, unknown and emerging email security threats. Stop large-scale phishing, targeted attacks, CEO fraud and malware in their tracks with a comprehensive, cloud email security solution. Email Security incorporates multiple technologies to ensure enterprise class threat detection rates with very high accuracy - over and above what single engine solutions can provide.