Carbonio - Self-Hosted Email Server and Full Control Over Your Data | nex-IT

Email is the backbone of communication in every company - but do you really know where your messages live? When you use Microsoft 365 or Google Workspace, you hand your company data to a third-party provider, pay a subscription per user, and accept their policies. Carbonio is a modern alternative that gives businesses full control over their email and data.

What is Carbonio?

Carbonio is a complete email and collaboration (groupware) platform developed by Zextras. It combines email, calendars, contacts, task management, file sharing, and video conferencing in a single solution - all running on your own server or in the infrastructure you choose.

Carbonio is often described as the successor to Zimbra - a mature, fully self-contained platform designed around data sovereignty and compliance with European regulations, including GDPR.

The key benefit: Your emails, attachments, and documents never leave the infrastructure you control.

Why a self-hosted Carbonio email server?

1. Full data sovereignty

All messages, attachments, and user data are stored wherever you decide - on a server at your premises, in a local data center, or on a private cloud. No third party has access to your correspondence, which is critical for:

• law firms and consultancies,
• healthcare providers processing sensitive data,
• public institutions and local governments,
• companies subject to strict industry requirements.

2. Predictable costs instead of per-user subscriptions

In the cloud model, you pay a monthly fee for every mailbox - the more employees, the higher the recurring cost. Carbonio works on a licensing model or a Community edition, which delivers real savings and budget predictability as your user count grows.

3. GDPR compliance and EU data localization

Keeping data on a server in the EU significantly simplifies GDPR compliance. You don't have to analyze data transfers to the US or rely on mechanisms such as the Data Privacy Framework.

4. No vendor lock-in

Open standards (IMAP, SMTP, CalDAV, CardDAV, EAS) mean you're not tied to a single provider. Migrating data to and from Carbonio is simple and transparent.

Key Carbonio features

Carbonio vs Microsoft 365 and Google Workspace

Who is Carbonio for?

Carbonio is an especially good fit for:

• companies with 20+ users, where cloud subscriptions become expensive,
• organizations processing sensitive data, where data control is a priority,
• public institutions and local governments requiring in-country data localization,
• companies that want independence from the pricing and terms of major providers.

Self-hosting challenges - and how we solve them

A self-hosted email server requires proper configuration to ensure messages reach recipients and stay secure. The most common challenges are:

• Deliverability - correct SPF, DKIM, DMARC, and reverse DNS configuration,
• IP reputation - building trust for a new server,
• Security - anti-spam, anti-virus, updates, attack protection,
• Backup and continuity - regular backups and a recovery plan.

This is exactly where nex-IT comes in - we handle the full deployment and maintenance, so you get the benefits of a self-hosted server without the technical headaches.

How nex-IT deploys Carbonio for your company

As an IT company, we handle the technical deployment and maintenance of Carbonio email servers:

• Infrastructure analysis and selection - on-premise server, data center, or private cloud,
• Carbonio installation and configuration - email, calendars, files, video conferencing,
• Deliverability setup - SPF, DKIM, DMARC, reverse DNS,
• Data migration - secure mailbox migration from Microsoft 365, Google Workspace, or Zimbra,
• Security - anti-spam, anti-virus, 2FA, encryption,
• Backup and monitoring - backups and continuous server supervision.

Summary

Carbonio is a mature email and collaboration platform for companies that want to regain control over their data, reduce recurring subscription costs, and meet GDPR requirements. It's a genuine alternative to Microsoft 365 and Google Workspace - especially for organizations handling sensitive data or seeking independence from global providers.

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Considering a self-hosted email server? We'll help you assess whether Carbonio is the right fit for your company and take care of the entire deployment - from installation to migration and maintenance. Contact us!