Platform & Architecture
Product Overview ESMTP, IMAP4rev2, JMAP, ActiveSync 16.1, Webmail & GoBD in one binary All 40+ Features v1.3.1 Dual-DKIM, SpamGuard, Encrypted File Share, OpenTelemetry, ZUGFeRD & OCR full-text search System Comparison Side-by-side matrix vs. Stalwart, Microsoft Exchange® & Postfix
Migration & Security
1-Click Migration Direct importer for Windows® hMailServer, Exchange® & live IMAP sync Security & Trust GoBD WORM, IDW PS 880 roadmap, release changelog & checksums
Try instantly in your browser: Explore the Admin Cockpit & Webmail live without signing up.
Live Demo Hub -> /admin/ /mail/
Setup & Reference
Guided Installation 8 Steps From fresh Windows .msi, Linux, or Docker host to verified mail flow Documentation Hub 14 Guides Structured manual in 5 categories: DNS, IPv6, TLS, SpamGuard & GoBD 19 Hoster & NAS Blueprints Docker® Compose, Windows® Service, Proxmox®, Synology®, Hetzner & netcup
Live Tools & Automation
DNS & Reverse DNS Advisor Live inspector & generator for MX, SPF, Dual-DKIM, DMARC & IPv4/IPv6 PTR CLI & API Object Schema (Reference) 12 Types All objects, JSON fields, enums, nextxch-cli & POST /api/v1/send Firewall & pfSense Troubleshooting Symptom playbooks for Port 25, Hairpin NAT, TLS certs & ActiveSync
Self-contained verified packages: 100% air-gapped ready · Windows .msi, Linux .deb/systemd & Docker.
SHA-256 Checksums ->
Live Demo Pricing Contact
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Interactive Live Demo (Admin & Webmail)
Product & Architecture
Product Overview All 40+ Features System Comparison (Stalwart & Exchange®) 1-Click Migration (hMailServer & IMAP) Security, GoBD & Release History
Documentation & Tools
Guided Installation (8 Steps) Documentation Hub (14 Guides) 19 Hoster, NAS & Container Blueprints DNS & Reverse DNS Advisor nextxch-cli Command Reference API & CLI Object Schema (All Fields) API Keys & Send API (/api/v1/send)
Pricing & Licensing
Pricing, Calculator & Checkout 30-Day Trial & Contact
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Legal

Legal & Compliance

Review our terms of service, privacy practices, and legal commitments for nextxch. All documents are issued by iqmeta GmbH, Waldenbuch, Germany, Paid licenses are offered exclusively to business customers (B2B); the Community Edition is also available for private use.

Website & Privacy

Provider identification, data protection and cookies on nextxch.com.

Imprint / Legal Notice Provider identification pursuant to Section 5 DDG and Section 18 (2) MStV. Last updated: 1 November 2026 · v2.0 Privacy Policy How we process personal data on nextxch.com, in the demo, at checkout and in support (GDPR). Last updated: 1 November 2026 · v3.0 Cookies Policy Which cookies and browser storage entries nextxch.com uses (no tracking). Last updated: 1 November 2026 · v1.0

Licensing & Commercial

Contract terms for licensing, purchasing, refunds and partners.

Terms and Conditions General terms for trials, license purchases, payment, term, warranty and liability (paid licenses B2B only). Last updated: 1 November 2026 · v2.0 License Agreement (EULA) License terms for nextxch: usage rights, editions, support, warranty and liability. Last updated: 1 November 2026 · v2.1 Refund & Cancellation Policy Trial before purchase, goodwill refunds and cancellation of subscriptions. Last updated: 1 November 2026 · v1.0 Reseller & Partner Terms Conditions for system houses, MSPs and resellers distributing nextxch. Last updated: 1 November 2026 · v1.0

Security, Data & IP

Vulnerability disclosure, data processing, sub-processors and intellectual property.

Vulnerability Disclosure Policy How to report security issues, our response commitments and safe harbour for researchers. Last updated: 1 November 2026 · v2.0 Data Processing Agreement (DPA) Agreement on processing on behalf pursuant to Art. 28 GDPR, incl. technical and organisational measures. Last updated: 1 November 2026 · v2.0 Sub-processor List Service providers that process personal data on behalf of iqmeta GmbH. Last updated: 1 November 2026 · v1.0 Acceptable Use Policy Rules for using nextxch, the live demo, tools and support channels. Last updated: 1 November 2026 · v1.0 Copyrights and Trademarks Our intellectual property, third-party trademarks and the notice and takedown procedure. Last updated: 1 November 2026 · v1.0 Third-Party Notices Open-source components used in nextxch, with versions and licenses. Last updated: 1 November 2026 · v1.0

Have a legal or compliance question?

Reach out and we will send the latest version of any document directly, including signed PDF copies (for example the DPA).

iqmeta GmbH
Am Sonnenhang 24
71111 Waldenbuch, Germany
support@nextxch.com
security@nextxch.com

Sovereign Mail & Groupware Server: mail, calendars, contacts and GoBD archive on your own infrastructure, for Docker® Compose, Windows Server® (no Docker®), Linux®, macOS®, NAS, and Kubernetes®. Engineered in Germany by iqmeta GmbH.

Made and hosted in Germany Made and hosted in Germany exali IT-Haftpflicht Siegel iqmeta GmbH IT Liability InsuredVerified Seal · iqmeta GmbH

Platform & Tools

  • Read-Only Live Demo (Admin & Webmail)
  • Installation Manual (8 Steps & Troubleshooting)
  • Admin Manual, Defaults & Best Practices
  • All Features & Screenshots
  • DNS / SPF / DKIM / rDNS Advisor
  • Docker® Compose & Windows® Service Guides
  • Compare with Stalwart & Exchange®
  • 1-Click hMailServer & IMAP Migration
  • Pricing & License Calculator

Trust, Security & Legal

  • Release History, Escrow & Audit Status
  • Security Policy (security.txt)
  • SHA-256 Release Checksums
  • support@nextxch.com
  • Vulnerability Disclosure

Legal

  • Legal & Compliance
  • Imprint
  • Terms and Conditions
  • Privacy Policy
  • Cookies Policy
  • License Agreement (EULA)
  • Data Processing Agreement
  • Third-Party Notices
© 2026 iqmeta GmbH · Am Sonnenhang 24, 71111 Waldenbuch, Germany. Microsoft®, Exchange®, Exchange Online®, ActiveSync®, Outlook®, Microsoft 365®, Windows®, and Windows Server® are registered trademarks of Microsoft Corporation; Apple®, iPhone®, iPad®, Mac®, iOS®, and macOS® are trademarks of Apple Inc.; Google®, Gmail™, and Android™ are trademarks of Google LLC; Thunderbird®, Docker®, Kubernetes®, PostgreSQL®, Linux®, Debian®, Ubuntu®, Proxmox®, Raspberry Pi®, Synology®, and Stripe® are trademarks of their respective owners. Third-party trademarks are referenced strictly to indicate technical interoperability; iqmeta GmbH is neither affiliated with nor endorsed, licensed, or certified by their respective owners.
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