OpenMSP
Proxmox Mail Gateway logo

Proxmox Mail Gateway

Email Security

Open Source
Free Tier
E
Enterprise
Self-hosted
OpenMSP Score
59
47
Reddit Impact Score

Alternative Vendors

Rspamd
Rspamd
SpamAssassin
SpamAssassin
Piler
Piler
MailScanner
MailScanner

Commercial Alternatives

Barracuda Email Security
Barracuda Email Security
Mimecast Email Security
Mimecast Email Security
Proofpoint Essentials
Proofpoint Essentials
Proxmox Mail Gateway is a leading open-source email security solution available under GNU AGPLv3 license. Built on proven technologies including ClamAV antivirus engine and SpamAssassin, it protects against spam, viruses, phishing, and trojans. The solution can handle millions of emails per day with support for unlimited domains and multiple internal mail servers. Key features include an innovative Message Tracking Center, high availability clustering, and flexible deployment options (virtual appliance, bare metal, container). While completely free to use, enterprise subscriptions provide professional support, stable updates, and security enhancements.
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Key Features

Comprehensive Email Security

Full-featured mail proxy protecting against spam, viruses, Trojans, phishing, and malware using ClamAV antivirus engine and SpamAssassin

Message Tracking Center

Innovative web-based tracking system that summarizes all logs and provides fast, powerful analysis of email flow for over a million emails per day

High Availability Clustering

Unique application-level clustering scheme providing excellent performance with automatic node reintegration after failures

Flexible Deployment Options

Can be deployed as virtual appliance, bare metal, or container with support for unlimited domains and multiple internal mail servers

Pros and Cons

Pros

Open Source and Cost-Effective

Completely free open source solution under AGPLv3 license, reducing email security costs significantly

Easy Deployment and Management

Simple installation in minutes with user-friendly web-based management interface requiring no deep Linux knowledge

High Performance and Scalability

Can handle millions of emails per day with support for unlimited domains and multiple mail servers

Cons

Limited Commercial Support

Community support for free version may be limited compared to commercial email security solutions

Linux-Only Platform

Requires Linux infrastructure, which may not be suitable for organizations with Windows-centric environments

Advanced Features in Paid Version

Some enterprise features and stable updates require paid subscription, limiting capabilities of free version

Feature Comparison

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Frequently Asked Questions

Getting Started

OpenMSP is The MSP Knowledge Hub & Community Platform designed specifically for Managed Service Providers seeking to optimize their technology stack, reduce vendor costs, and discover open-source alternatives. We combine a comprehensive vendor directory, open-source solution catalog, and integrated community discussions to help MSPs make informed decisions.
Yes, completely free. Browse vendors and tools, read comparisons, and join community discussions - no cost, no registration required. OpenMSP is community-supported and focused on empowering MSPs to reduce costs and improve operational efficiency through open-source technology.
We help MSPs identify cost-effective alternatives to expensive commercial solutions, provide transparent vendor information, and connect you with proven open-source alternatives. Our platform enables MSPs to make informed decisions about their technology investments.
No account required for browsing vendors, reading comparisons, or accessing community content. Creating a free account with SSO (Microsoft, Google, or Slack) allows you to participate in discussions and save your favorite tools.

Platform Information

OpenMSP is currently community-supported. We focus on providing value to the MSP community first. Any future monetization will keep the core platform free for MSPs while maintaining our independence and commitment to unbiased information.
We focus exclusively on MSP needs with transparent vendor information and open-source alternatives. No vendor partnerships or sponsored listings - just honest, community-driven information to help MSPs make better technology decisions. Our biggest value is our community where MSPs help each other with questions, setup guidance, and sharing real-world experiences.
Our community of MSP professionals helps verify and update information. We also maintain direct research on tools and vendors to ensure accuracy. Community members can report outdated information, and we work to keep everything current.
OpenMSP was founded by Michael Assraf, who has extensive experience in the MSP industry and product leadership. As the former CEO & Founder of Vicarius, Michael grew a startup from $0 to $9M ARR with 500+ customers and deep experience working with MSPs, partners, and fundraising. OpenMSP represents his commitment to empowering the MSP community through better technology decisions and cost optimization.

Open-Source Tools & Alternatives

We assess tools based on active development, community size, documentation quality, production deployments by MSPs, and available support options. Tools must meet strict criteria for reliability and enterprise readiness.
Many open-source projects offer multiple support options including community forums, commercial support from vendors, professional services, and our community discussions where experienced MSPs share implementation guidance.