nextxch compared: including where others are better
We compare nextxch with 15 mail and groupware solutions. For each product you see where it is better than nextxch, where nextxch is better and what it costs for 250 users. Plus a separate list of everything nextxch still lacks. Vendor details with sources; anything we could not check is marked as such.
Summary
Who should pick nextxch, and who should not
nextxch is a good fit if ...
you want to run mail and groupware yourself (Windows® Service, Linux, Docker® or Kubernetes®) at public prices: free up to 6 mailboxes, Business from €2.40, Enterprise with ActiveSync®, EWS and MAPI from €4.80 per mailbox per year.
your users work with webmail, iPhone/iPad, Android, Apple Mail or Thunderbird (IMAP, CalDAV/CardDAV), with Enterprise also via ActiveSync®-compatible push* and Outlook® for iOS/Android.
you need a GoBD archive with auditor role, OCR and ZUGFeRD search and German procedural documentation (from Business).
you already run Microsoft® SQL Server® or PostgreSQL® and want to move from hMailServer, an IMAP server or (with Enterprise) Exchange® 2013 to 2019.
you are fine with a young product and a direct line to the development team.
Better pick something else if ...
you need a long-proven solution with the full Exchange® scope for Outlook® for Windows with the Exchange® account type: Exchange Server® SE, grommunio or SmarterMail. nextxch supports MAPI over HTTP but not yet every Exchange® special feature.
you need a long-proven EWS solution: Kerio Connect, SmarterMail, grommunio or Exchange Server® SE.
you want chat, video conferencing, file storage and online office from one source: Microsoft 365®, IceWarp, grommunio or Carbonio Workspace.
you need MDM with remote wipe and device policies: Exchange® with Intune, grommunio, Kerio Connect or Zimbra Professional.
you do not want to run your own server: Exchange Online® / Microsoft 365®, IceWarp Cloud or a hosting partner.
you need a long-proven vendor with a large installed base, partner network, certifications or 24/7 support: Microsoft®, Axigen (24x7 in Business Complete), Zimbra, Kerio Connect.
you want a free open-source solution: Stalwart Community or Postfix + Dovecot (with SOGo or Roundcube).
Frankly
What nextxch does not have (yet)
The real gaps across all competitors, with the current state in nextxch and who can do it today. If one of these points is decisive for you, another product is the better choice today.
What is missing
State in nextxch
Who has it today
Maturity and installed base
Young product: the 1.x versions were released in 2026, currently version 1.4. There are hardly any public references and no published large installations yet.
Exchange®, Postfix + Dovecot, Zimbra, Axigen, MDaemon, Kerio Connect and SmarterMail have been in use for many years; Stalwart has a large open-source community.
Maturity of the Outlook® connection (MAPI over HTTP)
Available since version 1.4 with Enterprise: Outlook® for Windows sets up an Exchange® account via Autodiscover (mail, calendar, contacts, address book, sending). The implementation is young and does not yet cover every Exchange® special feature.
Native: Exchange Server® SE, Exchange Online®, grommunio, SmarterMail (add-on). Via add-in: Axigen, MailEnable, MDaemon, Zimbra Professional, Kerio Connect.
Maturity of the EWS connection (Apple Mail, Outlook® for Mac)
Available since version 1.4 with Enterprise for Apple Mail, Calendar and Contacts and Outlook® for Mac. The implementation is young and not yet as field-proven as with the vendors on the right.
ActiveSync®, EWS, MAPI over HTTP and Autodiscover are unlocked only with a signed Enterprise or 30-day trial key, because of Microsoft®'s licence terms for these protocols (Enterprise from €4.80 per mailbox per year, from 15 mailboxes). Enterprise and the Enterprise trial are available on request; the separate licence agreement for these protocols is signed with the first request or order. With Free and Business, Outlook® works via IMAP/SMTP plus CalDAV/CardDAV, and phones via IMAP, CalDAV and CardDAV.*
Microsoft® itself (Exchange Server®, Exchange Online®). Which other vendors hold a protocol licence is not verified.
Mobile device management
ActiveSync® provisioning with a permissive policy only (optionally enforced); no remote wipe, no password or encryption policies for devices.
Chat, video conferencing, file storage, online office
Not included. There are only Teams meeting links on events and Encrypted File Share for secure file transfer.
Microsoft 365®, IceWarp, grommunio, Carbonio Workspace, SmarterMail; chat also in Kerio Connect and MailEnable, documents in Zimbra.
Maturity of Kerberos SSO and OAuth for protocols
Newly available: Kerberos SSO for webmail, admin and mail protocols from Business with an AD identity source, OAuth 2.1 (XOAUTH2, OAUTHBEARER, device code) for IMAP, SMTP, POP3 and ManageSieve in every tier. Both are off by default and young; tests against a production Active Directory with Outlook® and Thunderbird are still pending.
Exchange® (Kerberos, Modern Auth), grommunio, IceWarp (Kerberos).
Migration from Microsoft 365®
Built in are the hMailServer direct import and live IMAP sync, with Enterprise also migration from Exchange® 2013 to 2019 via EWS (mail, calendars, contacts, notes, tasks) and PST import. From Microsoft 365® only email via IMAP today.
Cluster architecture (active-active) is in place, but there are no published installations with tens of thousands of accounts.
Exchange Online®, Dovecot.
At a glance
Protocols, features and price of all products
Green: available. Orange: limited, as an add-on, via add-in or in development. Grey with cross: not available. Grey italic: not listed on the vendor pages or not verified by us. The table scrolls sideways; click a product name to jump to its section.
Product
IMAP
POP3
SMTP
JMAP
CalDAV / CardDAV
ActiveSync®
EWS
MAPI (Outlook® for Windows)
Webmail
Groupware
Own mobile apps
Cluster / HA
Anti-spam / antivirus
Archiving
Licensing model
Price for 250 users (net)
nextxch
IMAP4rev2
With STLS, UIDL, SASL
ESMTP, submission
RFC 8620/8621
Both
Enterprise only*
Enterprise only: Apple Mail, Outlook® for Mac
Enterprise only: Outlook® for Windows (MAPI over HTTP)
PWA, 15 colour themes
Calendar, contacts, tasks, notes; sharing and rooms from Business
Announced, not yet in stores
Active-active from Business
Adaptive filter + ClamAV
GoBD WORM archive from Business
Per active mailbox per year: Free up to 6 at no cost, Business from €2.40, Enterprise from €4.80, volume pricing
As of: November 2026. nextxch prices net per mailbox per year: Free up to 6 mailboxes at no cost; Business from €2.40 (250 mailboxes: €1.80); Enterprise with ActiveSync®, EWS and MAPI from €4.80 (250 mailboxes: €3.60), on request. The step price applies to all mailboxes of the licence.
Product by product
Where the others are better, where nextxch is better
nextxch compared to Stalwart
Community (AGPL) / Enterprise
Where Stalwart is better
The Community edition is open source (AGPL-3.0) and free without a mailbox limit. nextxch is not open source and only free up to 6 accounts.
Cheaper at entry level: Enterprise costs €2.00 per mailbox per year versus €2.40 for nextxch Business (up to 99 mailboxes), €1.70 from 500 mailboxes, tiered down to €0.89 in very large installations.
Very large open-source community (over 15,000 stars on GitHub), many guides, hosting templates and third-party integrations.
Wide storage choice (RocksDB, FoundationDB, PostgreSQL, MySQL/MariaDB, SQLite, S3, Azure Blob); clustering and high availability already in the free Community edition.
Mailboxes can be encrypted at rest with the user's S/MIME or OpenPGP key; Enterprise adds an AI spam classifier.
Premium Support is included from 150 mailboxes (initial response within 48 business hours).
Where nextxch is better
Built-in webmail (PWA) with calendar, contacts, tasks, notes, S/MIME and OpenPGP. Stalwart lists only an admin UI; webmail is added externally (e.g. Roundcube).
For 250 mailboxes €450 (Business, €1.80 per mailbox) instead of €500 per year.
With Enterprise, ActiveSync®-compatible push* for iPhone, Android and Outlook® for iOS/Android plus EWS and MAPI over HTTP; Stalwart lists no ActiveSync®.
Scheduling with rooms and resources, booking pages and Teams meetings on events.
Native Windows® Service with .msi wizard and Microsoft® SQL Server® as database; Stalwart lists no MS SQL Server®.
GoBD WORM archive with auditor role, OCR and ZUGFeRD search and procedural documentation export; Encrypted File Share in webmail.
Even the free Free tier (up to 6 mailboxes) includes the full webmail, S/MIME and OpenPGP, 2FA and passkeys, and the admin with spam filter and antivirus.
Price for 250 users
€500 / year (Enterprise), Community €0
Stalwart Enterprise tier 1 (25 to 499 mailboxes): €2.00 per mailbox per year, i.e. €500 for 250 mailboxes, with Premium Support (from 150 mailboxes).
Community edition: €0, community support only.
nextxch Business: €450 per year for 250 mailboxes (€1.80 per mailbox). At entry level (up to 99 mailboxes) Business costs €2.40, about 20% more than Stalwart Enterprise.
nextxch compared to Microsoft 365® / Exchange Online®
Exchange Online® Plan 1
Where Microsoft 365® / Exchange Online® is better
No server of your own: Microsoft® handles hosting, updates, high availability and operations. With nextxch you run the server, updates and backups yourself.
Outlook® for Windows, Mac, iOS and Android with the full feature set and decades of field use; nextxch connects Outlook® for Windows via MAPI over HTTP and Mac via EWS with Enterprise, but only since version 1.4.
Huge ecosystem depending on plan: Teams, SharePoint, OneDrive, Office apps, Intune (MDM), Defender and Purview, plus thousands of integrations and partners.
Certifications and attestations (e.g. ISO/IEC 27001, BSI C5); nextxch has no product certification yet.
Largest installed base in business: specialists, service providers and know-how are available everywhere.
Where nextxch is better
Data stays on your own infrastructure, without access by a US provider (CLOUD Act).
For 250 mailboxes €900 licence per year (Enterprise with ActiveSync®, EWS and MAPI over HTTP) instead of approx. €11,100 (Plan 1); add your own server or VPS and your operating effort.
Open standards: JMAP, IMAP4rev2, CalDAV and CardDAV; Exchange Online® offers no CalDAV/CardDAV.
GoBD WORM archive with auditor role, OCR and ZUGFeRD search from Business without a further add-on licence.
Price for 250 users
approx. €11,100 / year
Exchange Online® Plan 1: approx. €44.40 per user per year incl. hosting, i.e. approx. €11,100 for 250 users.
Microsoft 365® Business Standard (with Office apps and Teams): approx. €140.40 per user per year.
nextxch Enterprise: €900 licence per year (€3.60 per mailbox), plus server, operations and backups.
nextxch compared to Microsoft® Exchange Server® SE
Subscription Edition (since 1 Jul 2025)
Where Microsoft® Exchange Server® SE is better
The original: Outlook® for Windows via MAPI over HTTP, EWS, ActiveSync® and Outlook® on the web, native without add-in, proven over many versions.
Public folders, shared mailboxes, deep Active Directory integration and hybrid operation with Exchange Online®.
High availability with Database Availability Groups (DAG), Exchange Management Shell and a very large pool of admin and partner know-how.
Enterprise CAL with In-Place Archive, In-Place Hold and information protection.
Broad ecosystem for backup, archive, signatures and security, plus worldwide vendor support.
Where nextxch is better
Public price (Enterprise with ActiveSync®, EWS and MAPI over HTTP from €4.80 per mailbox per year, €900 for 250 mailboxes) instead of volume licensing with Software Assurance, CALs and Windows Server® licences.
Also runs on Linux, in Docker® and Kubernetes®, as a single process with a small resource footprint.
CalDAV/CardDAV and JMAP for non-Microsoft clients, built-in anti-spam with ClamAV and a GoBD archive.
No dependency on IIS and Active Directory. Exchange servers have repeatedly been targets of large-scale attacks (e.g. ProxyLogon 2021); a new code base, however, is no proof of security in itself.
Price for 250 users
on request
Microsoft® publishes no list price for Exchange Server® SE. Required are a server licence (Standard up to 5, Enterprise up to 100 mailbox databases) and 250 CALs, each with active Software Assurance, or matching cloud subscriptions per user; plus Windows Server® licences.
The price comes from the Microsoft® partner under a volume licensing agreement. Outlook® (MAPI over HTTP), EWS and ActiveSync® are included.
MAPI over HTTP and EWS with the full Exchange® feature set and long field experience. nextxch offers MAPI over HTTP and EWS with Enterprise but does not yet cover every Exchange® special feature.
Public folders, shared mailboxes and LDAP integration as known from the Exchange® world.
Mobile device management with remote wipe, encryption and password policies; nextxch has no remote wipe.
More than mail: chat, video conferencing (Meet), files with versioning and online office (OnlyOffice) from one source.
Certified partner network for sales, operations and hosting; multi-tenancy with delegated administration.
Where nextxch is better
Also runs as a native Windows® Service, with Microsoft® SQL Server® or PostgreSQL®; grommunio runs on Linux.
JMAP, active-active clustering and a GoBD WORM archive with OCR and ZUGFeRD search without further add-ons.
Public direct price: Enterprise with MAPI over HTTP and EWS €900 instead of €5,970 to €16,470 per year for 250 mailboxes.
Free up to 6 mailboxes (Free tier, without the Microsoft protocols); the grommunio Community edition (up to 5 users) has no vendor support.
Price for 250 users
€5,970 to €16,470 / year
List prices €1.99 (Basic), €3.99 (Plus) or €5.49 (Business, from 50 users) per user per month, calculated for 12 months: €5,970, €11,970 or €16,470 per year.
All features in every plan; plans differ in support. Available only via certified partners; Enterprise from 1,000 users on request.
On the market for many years, with a mature HTML5 webmail and a dedicated mobile webmail.
Outlook® for Windows usable today via the Axigen Outlook Connector (add-in, Outlook® 2010 to 365).
Business Complete includes 24x7 support and Bitdefender as a commercial anti-spam and antivirus engine.
ISP edition with clustering, front-end/back-end architecture and Kubernetes® deployment; online backup with full or partial restore.
Where nextxch is better
Anti-spam and ClamAV already in Free; ActiveSync®-compatible push*, EWS and MAPI over HTTP together in Enterprise. With Axigen Business, ActiveSync® and antivirus are add-ons or part of Business Complete.
Enterprise: €900 instead of €4,497.57 per year for 250 mailboxes.
JMAP, active-active clustering from Business and a GoBD WORM archive with OCR and ZUGFeRD search.
Microsoft® SQL Server® or PostgreSQL® as database.
Price for 250 users
€4,497.57 / year (Complete)
Business Complete: €4,497.57 per year for 250 users (renewal from year 2: €4,497.57), with maintenance and 24x7 support, AntiVirus & AntiSpam (Bitdefender) and Exchange ActiveSync®.
Alternatively Business Core €2,398.55 + ActiveSync® €1,443.75 + AntiVirus & AntiSpam €866.25 per year.
Perpetual per-server licence for unlimited mailboxes and domains; the Standard edition is free.
Outlook® for Windows today via the MAPI Connector (Premium: no mailbox limit) and public folders.
XMPP chat and video chat in webmail.
Widely used by Windows® hosters for many years.
Where nextxch is better
Runs on Linux, in Docker® and Kubernetes® besides Windows®; MailEnable runs on Windows Server® only.
ActiveSync®-compatible push*, EWS and MAPI over HTTP together in Enterprise; with MailEnable ActiveSync® is a separate yearly licence per mailbox.
JMAP, OpenTelemetry, active-active clustering and a GoBD WORM archive.
Price for 250 users
US$1,295 one-time + US$1,198 / year ActiveSync®
US$1,295 one-time (per-server licence, unlimited domains and mailboxes, MAPI Connector, 12 months upgrade protection, Bronze support) + US$1,198 per year for ActiveSync® (tier up to 300 mailboxes).
Over 5 years with ActiveSync®: US$7,285 plus upgrade protection renewal (price on request); nextxch Enterprise with ActiveSync®: €4,500.
Complete collaboration platform: TeamChat, documents with versioning, WebRTC conferencing (up to 500 participants, webinars up to 5,000) and file storage.
Own mobile app and desktop client; EAS 16.1.
AD/LDAP, Kerberos, multi-node operation and multi-tenancy, plus its own cloud offering.
Anti-Spam LIVE (outbreak protection), SpamAssassin, IP reputation and built-in antivirus.
Where nextxch is better
Public list price for self-hosting (Business from €2.40, Enterprise with ActiveSync® from €4.80 per mailbox per year); IceWarp quotes self-hosted prices only via sales.
JMAP and the whole server in Docker®; with IceWarp, Docker® is only listed for full-text search.
PostgreSQL® or MS SQL Server® without restriction, GoBD archive with OCR and ZUGFeRD search.
Price for 250 users
on request (cloud: €6,750 / year)
Self-hosted: price on request only.
For reference, the public cloud prices: Essential (with EAS) €2.25 per user per month billed annually, i.e. €6,750 per year for 250 users (incl. hosting).
MAPI and EWS for Outlook® on Windows and Mac proven in the field for years (add-on); in nextxch available only since version 1.4.
Chat, online meetings and file storage in webmail, plus marketplace integrations (e.g. Dropbox, Google Drive, OneDrive, ownCloud, Rocket.Chat).
Perpetual licence: without MAPI/EWS and EAS US$1,200 for 250 mailboxes; maintenance from year 2 optional.
Optional commercial filters (Cyren, Message Sniffer) and hub-and-node high availability.
Where nextxch is better
ActiveSync®-compatible push*, EWS, MAPI over HTTP and active-active clustering together in Enterprise; with SmarterMail, EAS and MAPI/EWS are add-ons and HA is a separate monthly plan.
Enterprise: €900 per year versus US$3,075 in the first year for 250 mailboxes (with MAPI/EWS and EAS).
JMAP and a GoBD WORM archive with OCR and ZUGFeRD search.
Price for 250 users
US$3,075 in year 1 (with MAPI/EWS and EAS)
US$3,075 in the first year: US$1,200 licence (250 mailboxes) + US$450 MAPI/EWS + US$1,425 EAS, each with 12 months maintenance.
From year 2, maintenance at 50% of the new price; EAS and optional Cyren filters only with yearly renewal.
EWS for Outlook® for Mac and Apple Mail and the Kerio Outlook Connector for Windows are available today.
Remote wipe of mobile devices by the admin; built-in chat with XMPP support.
Also runs on macOS®; automatic backup with granular restore.
Partner-hosted cloud option and an established GFI partner network.
Where nextxch is better
Public list price (Enterprise with EWS, ActiveSync® and MAPI over HTTP from €4.80 per mailbox per year, free up to 6 mailboxes with Free); Kerio Connect only via partners on request.
JMAP, active-active clustering (from Business), Docker® and Kubernetes®.
GoBD WORM archive with OCR and ZUGFeRD search.
Price for 250 users
on request
GFI publishes no list price; a certified GFI partner prepares the quote.
Long-standing Windows® mail server with webmail, groupware and public prices in the purchase configurator.
Outlook® for Windows today via the MDaemon Connector for Outlook (add-in).
Modular licence: if you only need server and ActiveSync®, you pay US$1,897 per year.
Where nextxch is better
Anti-spam and ClamAV already in Free, ActiveSync®-compatible push*, EWS and MAPI over HTTP together in Enterprise; with MDaemon separate annual licences.
Enterprise: €900 instead of US$4,108 per year for 250 mailboxes (with ActiveSync®, connector and AntiVirus).
Also runs on Linux and in Docker®, with JMAP, active-active clustering and a GoBD archive.
Price for 250 users
US$4,108 / year (with EAS, connector, AV)
New licence with a 1-year term for 250 users: server US$1,438, MDaemon ActiveSync US$459, MDaemon Connector for Outlook US$1,400, MDaemon AntiVirus US$811, together US$4,108.
Server and ActiveSync® only: US$1,897 per year. No EWS access is listed.
Backup and restore as well as Zimbra Office (documents) in both editions.
Professional: mobile device policy management, archiving & discovery with litigation hold, and the Zimbra Connector for Outlook for Outlook® for Windows.
EWS interoperability (with a separate licence) available today.
Where nextxch is better
ActiveSync®-compatible push* and EWS come together in Enterprise; with Zimbra ActiveSync® is Professional only, and EWS costs extra.
Public price (Business from €2.40, Enterprise from €4.80 per mailbox per year) instead of a quote.
Also runs on Windows®; JMAP and a GoBD WORM archive with OCR and ZUGFeRD search.
Price for 250 users
on request
Zimbra publishes no list price and refers to a quote.
Workspace edition with video meetings (recording, external participants) and collaborative editing of documents, spreadsheets and presentations.
Backup, storage tiering (HSM) and object storage in the commercial editions; MDM as an add-on.
Free Community edition to get started.
Where nextxch is better
ActiveSync®-compatible push*, EWS and MAPI over HTTP in Enterprise at a public list price; the Carbonio Community edition lacks ActiveSync® and Outlook® sync.
Public price instead of a quote; also runs on Windows® and with MS SQL Server®.
JMAP, CalDAV/CardDAV and a GoBD WORM archive.
Price for 250 users
on request
Zextras publishes no prices for the commercial Email and Workspace editions.
Invitations with required/optional attendees, replies also by link, recurring series with exceptions, free/busy planning, rooms and resources (projectors, vehicles)
Invitations (iMIP) and free/busy lookup; room and resource booking not listed on stalw.art
Via SOGo / Nextcloud
Yes (room mailboxes)
Booking pages & Teams meetings
Booking pages like Calendly / Microsoft Bookings, Microsoft Teams meetings on events
Not listed on stalw.art
Bookings / Teams (depending on plan)
Shared calendars, delegation (send as / on behalf of)
Shared and global calendars with read/write rights, mailbox delegation with send as and send on behalf of
Granular ACLs, sharing via WebDAV ACL and JMAP Sharing
IMAP ACL, calendars via SOGo
S/MIME & OpenPGP
Sign and encrypt directly in webmail
Per-mailbox encryption with the user's S/MIME certificate or OpenPGP key
Mail client only
S/MIME in Outlook®
Mobile: ActiveSync®-compatible & own iOS and Android apps
IMAP and CalDAV/CardDAV in every tier; push via ActiveSync® on iPhone, Android and Outlook for iOS/Android with Enterprise; own nextxch apps coming soon to the App Store and Google Play
Standard clients via IMAP, CalDAV/CardDAV and auto-discovery; own apps not listed on stalw.art
Separate Z-Push
Outlook® app
Built-in Webmail PWA + 15 Color Themes
Included (Mail, Calendar, Contacts, Notes, Tasks & WebPush)
Brand/link heuristics, phishing check & reporting in webmail, 69 sending services, IP unblock requests
Spam filter rules (no webmail check)
External spam filters only
Rspamd modules (no webmail integration)
Baseline protection, extended via Defender for Office 365®
Source-Code Escrow & Security Process (RFC 9116)
German Escrow option + Enterprise SLA from 10,000 accounts (RFC 9116 security process included)
AGPL core + proprietary Enterprise crates
Open Source
Proprietary cloud SLA
* Legal interoperability notice: The optional WBXML Mobile Push interface (configurable via ActiveSync:Enabled) is an independent clean-room implementation by iqmeta GmbH based on publicly documented interoperability specifications ([MS-ASHTTP]/[MS-ASCMD]/[MS-ASWBXML]) for connecting compatible client devices. ActiveSync®, EWS, MAPI over HTTP and Autodiscover are unlocked only with a signed Enterprise or trial key, because of Microsoft®'s licence terms for these protocols; both are available on request with a separate licence agreement for these protocols. Microsoft®, Exchange®, Exchange Online®, Exchange Server®, ActiveSync®, Outlook®, Microsoft 365®, Windows®, Windows Server®, SQL Server®, Apple®, iPhone®, and macOS® are registered trademarks of their respective owners. nextxch is neither affiliated with nor endorsed, licensed, or certified by these companies.
Sources, retrieved on 1 and 2 November 2026: the vendor pages linked per product, plus axigen.com/buy/business (configurator, 250 users, EUR), mailenable.com/pricing.asp, icewarp.com/pricing, smartertools.com/smartermail/pricing and portal.smartertools.com (KB a498, a506, a3518), progress.com/imailserver (redirect, lifecycle date per Progress announcement of 2022), gfi.ai/kerioconnect, stalw.art/pricing and stalw.art/compare, microsoft.com (Exchange Server licensing, Exchange Online plans), learn.microsoft.com (Exchange Server SE), grommunio.com/pricing and /features, zimbra.com/product/edition-comparison, mdaemon.com (purchase configurator: new licence, 1 year, 250 users), tine-groupware.de/produkte and the Business Edition price list linked there (12/2024), zextras.com/editions, sogo.nu, horde.org. grommunio and IceWarp cloud annual prices calculated from the monthly prices x 12. US$ prices shown without conversion, all prices net excluding VAT. "Not listed" means: not listed on the vendor's pages; "Not verified" means: we could not check it. No liability for vendor details; the vendor's own quote is authoritative. Axigen, MailEnable, IceWarp, SmarterMail, Kerio, Kerio Connect, GFI, Stalwart, grommunio, Zimbra, MDaemon, tine, Zextras, Carbonio, SOGo, Horde, hMailServer, Postfix, Dovecot and Rspamd are trademarks or registered trademarks of their respective owners; nextxch is not affiliated with these companies.