Skip to content
SPECIFICTION
Get listed

Xeams

xeams.com

From $1.67/mo Free plan WebWindowsmacOSLinuxAPISelf-hosted
Visit xeams.com
Spec score 8.6 #3 of 35 in Email Security Gateways

What it is

Xeams is an email server and spam firewall that can run standalone, sit in front of another mail server, or operate in hybrid mode. It supports SMTP, POP3, and IMAP, alongside email technologies including DKIM, SPF, DMARC, and MTA-STS. Filtering uses sender reputation, authentication checks, attachment and content rules, Bayesian analysis, and virus checks. Administrators use a web interface for live monitoring, logs, reports, retention settings, and tiered administration. Quarantined messages are kept on the server for 15 days by default and can be reached through the web interface or an IMAP client. Integrations include Active Directory and OAuth 2.0 outbound relaying for services such as Microsoft Exchange Online or Google Workspace. Outbound tools include DKIM signing, REST APIs, webhooks, campaigns, read receipts, and header sanitization. A new installation has Enterprise features for 30 days before converting to Community Edition unless licensed. Community Edition is free for up to 5 personal hobby users when spam filtering is used; its spam filtering is otherwise limited to 5 users. Enterprise Edition with Support is $300 a year per deployed instance; Enterprise per-user prices vary by tier.

Spec sheet

What it does
Xeams is an email server and spam-filtering gateway supporting SMTP, POP3 and IMAP.Read 15 Oct 2026 · xeams.com
Product
Xeams is an email server and spam firewall that can run standalone, in front of another mail server, or in hybrid mode.Read 5 Oct 2026 · xeams.com
Trial
A new installation runs with Enterprise Edition features for the first 30 days and then converts to Community Edition unless a license is purchased.Read 5 Oct 2026 · xeams.com
API
Xeams exposes an OpenAPI 3.0 REST API for sending mail, validating addresses, checking delivery status and administering users, domains and lists.Read 15 Oct 2026 · xeams.com
Integrations
Xeams describes Active Directory integration and outbound email relaying with OAuth 2.0 for services such as Microsoft Exchange Online or Google Workspace.Read 5 Oct 2026 · xeams.com
Security
The maker lists STARTTLS, SPF, DKIM, DMARC, and MTA-STS among the email technologies Xeams uses.Read 5 Oct 2026 · xeams.com
Compliance
The maker says Xeams can help with regulations including HIPAA, GLBA, CFPB, FERPA, Sarbanes-Oxley, and Safe Harbor.Read 5 Oct 2026 · xeams.com
Support
Support includes telephone, email, and public forums; phone and email support for the Community Edition is listed at $300/year.Read 5 Oct 2026 · xeams.com
Headquarters
Millstone, New Jersey, United StatesRead 28 Sep 2026 · xeams.com
Administration
The administration interface is entirely web based and supports delegated administration by domain.Read 15 Oct 2026 · xeams.com
API restriction
The REST API requires on-premise Xeams 9.3 or newer with an Enterprise licence covering at least 20 users and is unavailable in Xeams Cloud.Read 15 Oct 2026 · xeams.com
Archiving
Messages can be archived for a configurable period or indefinitely and are indexed for searching.Read 15 Oct 2026 · xeams.com
Cloud mail relay
It relays mail from legacy devices to Microsoft Exchange Online or Google Workspace using OAuth 2.0.Read 15 Oct 2026 · xeams.com
Company founded
LinkedIn lists Synametrics Technologies as founded in 1997.Read 15 Oct 2026 · linkedin.com
Company headquarters
The vendor lists its headquarters at 490 State Route 33, Millstone, New Jersey, USA.Read 15 Oct 2026 · xeams.com
Company history
Synametrics says it has provided IT solutions since 1997.Read 15 Oct 2026 · xeams.com
Company legal name
Xeams is published by Synametrics Technologies, Inc.Read 15 Oct 2026 · xeams.com
Company size
LinkedIn lists Synametrics Technologies as an 11–50 employee software-development company headquartered in Plainsboro, New Jersey.Read 15 Oct 2026 · linkedin.com
Deployment modes
The product can run as a standalone server, a firewall in front of another mail server, or in hybrid configurations.Read 15 Oct 2026 · xeams.com
Directory integration
Xeams integrates with Active Directory and other LDAP servers for user creation, authentication and recipient validation.Read 15 Oct 2026 · xeams.com
DNS integrations
The DNS automation feature supports AWS Route 53, GoDaddy DNS and Cloudflare for A, AAAA, CNAME and TXT records.Read 15 Oct 2026 · xeams.com
Documentation and support
Support includes telephone, email and public forums for Enterprise users; Community telephone and email support costs $300 per year.Read 15 Oct 2026 · xeams.com
Encryption
Outbound end-to-end encryption works with recipients on any domain, including when the sender uses Microsoft or Google cloud mail.Read 15 Oct 2026 · xeams.com
Filtering
Xeams provides spam, virus, phishing, URL and outbound-message filtering.Read 15 Oct 2026 · xeams.com
Installation
Windows installation uses setup.exe, while Linux uses Install.sh; no separate database or software package is required.Read 15 Oct 2026 · xeams.com
Licence
Xeams is proprietary freeware/shareware; the Community Edition is non-commercial and the Enterprise Edition is subscription licensed.Read 15 Oct 2026 · xeams.com
Limit: complexity and documentation
SoftwareFinder reviewers report that powerful features can be complex, some capabilities are not documented, and search can be difficult to use.Read 15 Oct 2026 · softwarefinder.com
Limit: licensing clarity
A Capterra reviewer said the licensing model can be confusing until the documentation is studied.Read 15 Oct 2026 · capterra.co.uk
Limit: restart behavior
Capterra lists reports that GUI-triggered server restarts can hang without explaining the delay.Read 15 Oct 2026 · capterra.co.uk
Limit: stability and pricing
SoftwareFinder reviews mention occasional crashes after updates, difficult QNAP installation and complaints that long-term pricing could be lower.Read 15 Oct 2026 · softwarefinder.com
Monitoring
Administrators can watch mail processing live and view log files as they are written.Read 15 Oct 2026 · xeams.com
Outbound tools
Outbound features include DKIM signing, REST APIs, event webhooks, email campaigns, read receipts, and header sanitization.Read 5 Oct 2026 · xeams.com
Platform support
The download page offers installers for Windows, Linux, macOS, UNIX/BSD, virtual machines, and QNAP.Read 5 Oct 2026 · xeams.com
Praise: filtering and usability
Capterra reviewers repeatedly describe Xeams as easy to administer, effective at separating legitimate mail from spam and backed by strong support.Read 15 Oct 2026 · capterra.co.uk
Praise: support and value
SoftwareFinder reviewers commonly praise Xeams for spam reduction, ease of operation, value and responsive customer support.Read 15 Oct 2026 · softwarefinder.com
Protocols
Supported mail and authentication standards include SMTP, POP3, IMAP, DKIM, DMARC, SPF and MTA-STS.Read 15 Oct 2026 · xeams.com
Quarantine
Quarantine reports let users restore messages and manage personal allow and block lists.Read 15 Oct 2026 · xeams.com
Rating on Capterra
4.7 out of 5 from 76 reviews.Read 15 Oct 2026 · capterra.co.uk
Rating on SoftwareFinder
4.7 out of 5 from 21 reviews.Read 15 Oct 2026 · softwarefinder.com
Recent security update
The September 22, 2026 release fixed XSS and CSRF issues, improved at-rest encryption and added sandbox URL authenticity checks.Read 15 Oct 2026 · xeams.com
SDK generation
The vendor provides an API specification that can be imported into Swagger Editor to generate clients in supported languages.Read 15 Oct 2026 · xeams.com
Security standards
The vendor lists STARTTLS, SPF, DKIM, DMARC and MTA-STS as industry-standard protections.Read 15 Oct 2026 · xeams.com
Self-hosting options
Downloads include Windows, Linux, macOS, UNIX/BSD, a VirtualBox or VMware image, and a QNAP package.Read 15 Oct 2026 · xeams.com
Spam filtering
Its filtering uses sender reputation, SPF/DKIM/DMARC checks, attachment and content rules, Bayesian analysis, and virus checks.Read 5 Oct 2026 · xeams.com
System requirements
The current requirements list Windows 10 or newer, Windows Server 2012 or newer, any Linux distribution, Solaris, HP-UX, AIX, macOS or BSD, with 1 GB RAM minimum and 100 MB installation space.Read 15 Oct 2026 · xeams.com
Third-party components
The EULA identifies Apache Tomcat, Apache Commons and Bouncy Castle as bundled open-source components under their respective licences.Read 15 Oct 2026 · xeams.com
Webhooks
Event webhooks can notify web applications when email events such as non-delivery reports occur.Read 15 Oct 2026 · xeams.com

Plans and prices

Community Edition Free Free for up to 5 users when used personally as a hobby; spam filtering limited to 5 users; unlimited users if junk filtering is not used Read 5 Oct 2026 · xeams.com
Community Edition Free indefinitely Personal/home use · spam filtering up to 5 users · unlimited users when junk filtering is not used · no AI filtering Read 15 Oct 2026 · xeams.com
Enterprise Edition, 1–9 users, annual $1.67 a month paid yearly 1–9 users · Enterprise features Read 15 Oct 2026 · xeams.com
Enterprise Edition, 1–9 users, monthly $1.92 a month paid monthly 1–9 users · Enterprise features Read 15 Oct 2026 · xeams.com
Enterprise Edition with Support $300 a year $300/year for every instance of Xeams deployed in your organization Per deployed instance; includes phone and email support Read 5 Oct 2026 · xeams.com
Enterprise Edition with Support $300 a year per Xeams instance Community support upgrade · telephone and email support Read 15 Oct 2026 · xeams.com
Enterprise Edition Price not published Paid Yearly; per-user monthly prices vary by tier from $1.6667 (1–9 users) to $0.1250 (over 5000 users) Tiered per-user pricing; no minimum cost; on-premise or cloud; shared cloud costs $100/month/machine with 20GB disk space in addition to subscription Read 5 Oct 2026 · xeams.com
Enterprise Edition Price not published Paid Monthly; per-user monthly prices vary by tier from $1.9167 (1–9 users) to $0.1438 (over 5000 users) Tiered per-user pricing; no minimum cost; on-premise or cloud; shared cloud costs $100/month/machine with 20GB disk space in addition to subscription Read 5 Oct 2026 · xeams.com

Every Xeams plan and price →

Strong points and limits

Strong points

  • Standalone, gateway, or hybrid operation
  • Filtering combines reputation, rules, analysis, and virus checks
  • Quarantine is accessible through web or IMAP
  • Supports outbound tools and Microsoft 365

Limits

  • Default quarantine retention is 15 days
  • Community spam filtering is limited to 5 users
  • Enterprise per-user pricing varies by tier
  • End-to-end encryption is an Enterprise feature

Who it suits

Xeams suits organizations that want to run their own mail server or add filtering in front of an existing one. Its web administration, integrations, and deployment options may also suit teams managing email across multiple systems.

Xeams in depth

Read the full write-up

Overview

Xeams is an email server and spam firewall for organizations that want to operate their own mail filtering, either standalone or alongside an existing mail server. It suits teams willing to administer a configurable gateway; the free filtering tier is small, while paid costs depend on user count or deployment.

Key features

SMTP, POP3, and IMAP support let Xeams handle core mail-server duties, while DKIM, SPF, DMARC, and MTA-STS provide authentication and transport-policy support. Filtering combines sender reputation, authentication checks, attachment and content rules, Bayesian analysis, and virus checks. This breadth is useful when administrators need several controls over incoming mail, but it makes Xeams a less natural fit for organizations seeking a hands-off filtering service.

Quarantined mail remains on the server for 15 days by default and can be reached through the web interface or an IMAP client. Administrators can monitor live email activity, review logs and reports, set retention, and use tiered administration. Active Directory integration and OAuth 2.0 outbound relaying for services such as Microsoft Exchange Online and Google Workspace can support deployments built around those environments.

Outbound capabilities include DKIM signing, REST APIs, event webhooks, email campaigns, read receipts, and header sanitization. End-to-end encryption is an Enterprise feature, and some plugins are restricted to on-premise or dedicated-cloud deployments. Xeams can help with regulations including HIPAA, GLBA, CFPB, FERPA, Sarbanes-Oxley, and Safe Harbor, but that is not a guarantee of compliance.

Pricing

The Community Edition costs nothing. It is free for up to 5 users for personal hobby use, with spam filtering limited to 5 users; unlimited users are allowed if junk filtering is not used. That distinction makes it practical for a small personal setup or mail-server use without filtering, but not a free way to filter mail for a larger organization.

Enterprise Edition with Support costs $300 a year for every deployed instance and includes phone and email support. The flat per-instance charge can suit an organization that values direct support, though it is separate from Enterprise Edition's tiered per-user subscription.

Enterprise Edition uses custom pricing: monthly per-user rates vary by tier, from $1.9167 for 1–9 users to $0.1438 for over 5000 users, with no minimum cost. It can run on-premise or in the cloud. Shared cloud deployment adds $100/month/machine for 20GB of disk space, on top of the subscription. The tier structure gives larger deployments a lower per-user rate, while the shared-cloud machine charge adds a separate cost to budget for.

New installations receive Enterprise Edition features for 30 days, then convert to Community Edition unless a license is purchased. Phone and email support for Community Edition is $300/year. Check which license and deployment costs apply before relying on Enterprise features such as end-to-end encryption.

Platforms

Xeams supports API, Linux, macOS, self-hosted, web, and Windows environments. Installers are also offered for UNIX/BSD, virtual machines, and QNAP. The range favors organizations that want deployment flexibility, including self-hosting, rather than a platform-specific hosted-only product.

Who it's for

Xeams is a strong candidate for organizations that want mail-server functions and spam filtering under one administrative roof, especially those already using Microsoft 365 or Google Workspace for outbound relaying. It is less compelling for teams that need end-to-end encryption on a lower tier, or that want free filtering beyond five users.

Pros and cons

Pros: Standalone, gateway, and hybrid operation gives administrators options for fitting Xeams around existing mail infrastructure.

Pros: Multiple filtering methods, quarantine access through web or IMAP, and configurable administration provide meaningful control over mail handling.

Pros: Community Edition can serve unlimited users when junk filtering is not used, and the 30-day Enterprise trial allows evaluation of paid features.

Cons: Free spam filtering stops at five users, limiting its usefulness as a no-cost organizational gateway.

Cons: Enterprise pricing varies by user tier, and shared cloud adds a per-machine charge; budgeting requires accounting for both.

Cons: End-to-end encryption is reserved for Enterprise, with some plugins further limited by deployment type.

Alternatives

Email Security Gateways is the broader category to browse if you want to compare gateway options.

Choose Check Point Harmony SASE if you want a paid product with a 30-day trial and support across mobile, desktop, and web platforms rather than Xeams' mail-server and gateway deployment choices.

VM Backup is a freemium option with a free edition capped at two VMs per host; it is a different category of software, so consider it for virtual-machine backup rather than email filtering.

Hermes Secure Email Gateway is worth considering if you want a free, open-source, self-hosted Docker Compose gateway, or a per-server Pro Edition at $750 a year.

Rspamd may fit teams looking for a free, open-source, self-hosted filtering engine; its Scale plan costs £100 a month.

IRONSCALES Email Protect is an alternative for teams seeking advanced spam and graymail protection, URL scanning, malicious-attachment scanning, and autonomous remediation.

Mailprotector offers a free Radar email security check, with its other product pricing available from an account manager.

LevelBlue AppDetectivePRO offers a complimentary single-license trial, subject to its stated evaluation restrictions.

Mimecast Data Leak Prevention is an alternative for SaaS and cloud exfiltration detection, with Professional and Enterprise plans.

Verdict

Choose Xeams if you want a flexible mail server and spam firewall that you can operate standalone, in front of existing infrastructure, or in hybrid mode. Its layered filtering and administration tools are the main draw; look elsewhere if your priority is free filtering beyond five users or end-to-end encryption without an Enterprise subscription.

Verdict

Xeams combines mail-server functions, spam filtering, quarantine, and outbound tools, with a free Community Edition under stated limits. Review the user limits, tiered Enterprise pricing, and encryption availability before choosing a plan.

Where Specifiction places it

Alternatives to XeamsAll alternatives →