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Top Rated Secure Email Gateway Software with Linux

Last updated: September 2026

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5 software options

Libraesva Email Security logo

Exceptional Email Security

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Libraesva Email Security stops known and emerging email threats from reaching their target, so you only receive legitimate messages. It provides exceptional email security by integrating cloud email and a secure email gateway with Libraesva’s unique Adaptive Trust Engine.

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Selzy logo

Affordable email marketing software

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Selzy is an intuitive email marketing platform that suits any business needs. It offers a wide range of integrations with your favorite tools, an easy-to-use drag&drop editor, and email templates for any occasion.

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SpamTitan logo

Anti-spam filter for business email. Vital email security.

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SpamTitan is an anti-spam email security solution that identifies & blocks phishing, malware, spear phishing, malicious and spam emails to protect business email, with multi-layered analysis and authentication. 5 Star product with great pricing and amazing front line support

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inDefend logo

Enterprises, SMEs & Startups

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inDefend Advanced is an all-in-one cybersecurity, insider threat management, and employee monitoring solution that empowers organizations to secure their sensitive data, enhance workforce productivity, and comply with global security regulations.

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RMail logo

RMail®, track, prove, encrypt, e-sign, certify, all-in-one.

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RMail® is the e-security platform by RPost®. RMail specializes in elegantly easy to use email encryption for privacy and compliance, e-signatures, legal e-delivery proof, secure file sharing, email impostor protection, and AI-infused services to prevent data leaks and human e-security errors.

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