Proxmox Mail Gateway
Proxmox Mail Gateway: A focused self-hosted gateway with broad filtering controls and predictable per-host pricing. Ranked #21 of 34 in Email Security Gateways by our editors (7.2/10); pricing: Open source; best for self-hosted teams needing predictable pricing.
At a glance
- Editor score7.2 / 10
- PricingOpen source
- Best forSelf-hosted teams needing predictable pricing
- Free planNo
- Paid from€190/yr
- Outbound filteringYes
- Founded2005 · Vienna, Austria
- Facts checked20 Sep 2026
Where it wins
- Scans inbound and outbound mail with SpamAssassin and ClamAV
- Detailed SMTP filtering, rules, quarantine, and mail actions
- High-availability clustering with web, CLI, and API administration
Where it doesn't
- Requires self-hosted deployment between the firewall and mail server
- Annual subscriptions are priced per host rather than per user
- Support response times and ticket allowances vary by plan
Our verdict on Proxmox Mail Gateway
Proxmox Mail Gateway is an open-source mail proxy for organizations that need to filter and control email before it reaches an internal mail server. It sits between the firewall and mail server, analyzing inbound and outbound traffic for spam, viruses, Trojans, phishing, and other email threats. The product is suited to self-hosted teams running dedicated hardware or a virtual appliance, particularly where per-host pricing is easier to forecast than per-user licensing.
Its standout strength is the breadth of gateway controls. SpamAssassin and ClamAV provide spam and virus detection, while SMTP filtering adds receiver verification, SPF, DNSBL, SURBL, and greylisting. Administrators can apply object-oriented rules based on senders, recipients, time, content, and actions, then manage blocklists, allowlists, quarantine, and configurable mail handling. Message Tracking Center and unified log search support operational review, while high-availability clustering centralizes configuration for larger deployments.
Pricing is structured around four annual plans, all billed per host. Community costs €190 and includes the complete feature set, stable and secure updates, and community support. Basic costs €540 and adds five support tickets per year plus Customer Portal support. Standard costs €1,260 and adds 15 tickets, a four-hour response time, and remote support. Premium costs €1,900 with unlimited tickets, a two-hour response time, and remote support. Choose Proxmox Mail Gateway for self-hosted infrastructure, detailed SMTP policy control, and integrations with Postfix, Microsoft Exchange, Lotus Domino, ClamAV, and SpamAssassin. Teams seeking a primarily cloud-managed workspace service should consider a different fit.
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Proxmox Mail Gateway pricing
All 4 Proxmox Mail Gateway plans and prices →
Proxmox Mail Gateway fact sheet
| Free plan | No |
|---|---|
| Paid from | €190/yr |
| Outbound filtering | Yes |
| Impersonation protection | Not verified |
| Malware sandboxing | Not verified |
| Deployment model | Gateway |
| Microsoft 365 support | Not verified |
| Google Workspace support | Not verified |
| Deployment | Cloud, Desktop, Self-hosted |
| Platforms | Web, Linux |
| Integrations | 5 integrations: ClamAV, SpamAssassin, Postfix, Microsoft Exchange, Lotus Domino |
| Pricing | Open source (source) |
| Website | proxmox.com |
| Facts checked | 20 Sep 2026 |
Proxmox Mail Gateway integrations
Proxmox Mail Gateway lists 5 integrations on its own site.
- ClamAV
- SpamAssassin
- Postfix
- Microsoft Exchange
- Lotus Domino
Alternatives to Proxmox Mail Gateway
- Sublime SecurityA customizable email security platform with unusually broad protection in its free Core plan.9.4
- Sophos EmailA broad cloud gateway for Microsoft 365 and Google Workspace email protection.9.2
- Cloudflare Email SecurityA flexible email gateway for organizations needing layered inbound and outbound protection.9.0
See all Proxmox Mail Gateway alternatives →
Also Ranked In
Proxmox Mail Gateway is ranked in 3 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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