Xeams

Overview

Xeams is an email server and spam firewall that can operate on its own, in front of another mail server, or in a hybrid setup. Its breadth is a strength, but the free filtering tier’s five-user cap and the paid licensing structure deserve close attention.

Key features

Xeams handles SMTP, POP3, and IMAP, alongside DKIM, SPF, DMARC, and MTA-STS. Filtering layers sender reputation and authentication checks with attachment and content rules, Bayesian analysis, and virus checks. That range gives administrators several levers for screening mail, making Xeams a stronger fit for teams prepared to manage a configurable gateway than for users seeking a simple, hands-off filter.

Quarantined messages are retained on the server for 15 days by default and can be accessed through the web interface or an IMAP client. The web console provides live monitoring, logs, reporting, configurable retention, and tiered administration. Active Directory integration and OAuth 2.0 outbound relaying for services such as Microsoft Exchange Online and Google Workspace help accommodate existing environments.

Outbound capabilities include DKIM signing, REST APIs, event webhooks, email campaigns, read receipts, and header sanitization. End-to-end encryption is reserved for Enterprise, and some plugins are available only on on-premise or dedicated cloud deployments. Xeams also identifies technologies such as STARTTLS and MTA-STS in its security stack and says it can help organizations address regulations including HIPAA, GLBA, CFPB, FERPA, Sarbanes-Oxley, and Safe Harbor; that is a potential fit for regulated environments, not a substitute for assessing compliance requirements.

Pricing

Xeams is freemium, with a 30-day trial and paid plans from $1.67/user/mo (annual). A new installation starts with Enterprise Edition features for 30 days, then converts to Community Edition unless a license is purchased.

• Community Edition: Free for personal hobby use up to five users, with spam filtering limited to five users. It can support unlimited users if junk filtering is not used, so it is suitable for small personal deployments or mail-server use without filtering, but not as a free organization-wide spam gateway.
• Enterprise Edition with Support: $300 a year per deployed instance, including phone and email support. This suits organizations that want support at a fixed per-instance price; it is not a per-user subscription.
• Enterprise Edition: Custom pricing, billed monthly per user, with tiered rates from $1.9167 for 1–9 users to $0.1438 for over 5000 users and no minimum cost. It supports on-premise or cloud deployment. Shared cloud adds $100/month/machine for 20GB of disk space on top of the subscription, so the headline per-user rate is not the full shared-cloud cost.

Phone and email support for Community Edition is $300/year. Organizations should compare that support charge and the separate per-instance support plan against their deployment and user count before choosing a license.

Platforms

Xeams is available for Windows, Linux, macOS, UNIX/BSD, virtual machines, and QNAP, with API, web, and self-hosted support. The downloadable options and self-hosting emphasis make it suitable for teams managing their own infrastructure; it is not limited to a single operating system.

Who it's for

Xeams is a reasonable choice for organizations that need a gateway, mail server, or hybrid deployment with detailed web administration, outbound controls, and layered spam filtering. Its free edition is most compelling for hobby use or deployments that do not need junk filtering beyond five users. Teams needing more filtered users should budget for Enterprise licensing, and those requiring end-to-end encryption should account for its Enterprise-only status.

Pros and cons

• Pro: Standalone, gateway, and hybrid modes let administrators place Xeams in different mail architectures.
• Pro: Filtering combines reputation, authentication, content rules, Bayesian analysis, and virus checks rather than relying on one screening method.
• Pro: Live monitoring, logs, reporting, retention controls, and tiered administration provide substantial operational visibility through the web interface.
• Con: Community Edition limits spam filtering to five users, sharply narrowing its usefulness as a free organizational gateway.
• Con: Enterprise pricing varies by user tier, and shared cloud incurs an additional machine charge.
• Con: End-to-end encryption is not part of the free edition, and certain plugins require on-premise or dedicated cloud hosting.

Alternatives

For a broader comparison, see Email Security Gateways.

Choose Rspamd instead if you want an open-source, self-hosted Linux or macOS filtering engine, with a paid Scale option at £100 a month. Scrollout F1 is worth considering for a free Linux, Windows, or self-hosted gateway that supports unlimited domain names and email servers. MailScanner is another free, open-source Linux email gateway.

Hermes Secure Email Gateway offers a free, open-source self-hosted Docker Compose community edition alongside a paid Pro edition at $750 a year per server. Mailprotector may suit readers looking for a free email security check, while its product pricing is available from an account manager. Check Point Harmony SASE is a paid alternative with a 30-day trial and support across desktop, mobile, and web platforms.

VM Backup is a freemium alternative with a free edition covering two VMs per host. Spamihilator is a free Windows alternative for POP3 and IMAP email clients.

Verdict

Choose Xeams if you need a configurable email server and spam firewall with multiple deployment modes, web administration, and meaningful outbound tools. Its main advantage is the breadth of mail-flow and filtering controls; its main drawback is the need to match user caps, tiered or per-instance charges, and Enterprise-only encryption to your requirements. For a small hobby setup it can be free, but organizations needing more than five filtered users should plan for a paid license.