Stalwart as a Managed Service

One server instead of five: email, calendar, contacts and file sharing, all in one place.
We operate Stalwart as a consolidated mail and collaboration platform – with built-in spam and phishing protection and webmail access via Bulwark.

What is Stalwart?​

Stalwart consolidates functionality that traditionally requires several separate servers:

• Email via JMAP (modern), IMAP, POP3 and SMTP
• Calendar & contacts via CalDAV and CardDAV
• File sharing via WebDAV
• Built-in protection: DKIM, SPF, DMARC and ARC, plus spam and phishing filtering right at the SMTP inbound
• Encryption: TLS via automatic ACME, with optional at-rest encryption using S/MIME or OpenPGP

Webmail via Bulwark​

For browser-based access we also operate Bulwark – a modern, open-source webmail interface built specifically for Stalwart:

• Email, calendar and contacts in a single interface, right in the browser
• Server-side push instead of polling, for fast updates
• Classic clients (Thunderbird, Outlook, mobile mail apps) remain available on request via IMAP/SMTP or CalDAV/CardDAV

What We Offer​

We operate your Stalwart instance – either:

• On your own infrastructure (on-prem, private cloud, KubernetesKubernetes is a system for managing containerized applications – automated, scalable, and fault-tolerant. Learn more →)
• On our infrastructure (e.g. hosted in Austria)

As part of that, we handle:

• Setting up domains, mailboxes & DNS records (MX, DKIM, SPF, DMARC)
• Migrating existing mailboxes from Microsoft 365, Google Workspace or other providers
• MonitoringMonitoring spots problems before they escalate – active oversight, not just reacting. Learn more →, backupsBackups are the life insurance of digital systems. Learn more → & deliverability tracking
• Integration with Keycloak or your existing authentication

Licensing​

Stalwart is available in two editions: an open Community Edition and a commercial Enterprise Edition with extended features (for example, for very large multi-tenant setups). The Community Edition fully covers most requirements. If you need Enterprise features, we advise on the right licensing option – we do not handle license procurement itself.

Not to Be Confused With Radicale​

For pure calendar and contact syncing without email, we also operate Radicale – leaner and focused exclusively on CalDAV/CardDAV. Stalwart offers CalDAV/CardDAV as part of a full mail platform. We're happy to advise on which solution fits your needs.

Frequently Asked Questions​

Stalwart – Professionally Operated by RiKuWe​

We take care of the reliable, secure operation of your email infrastructure – so communication keeps running without ending up with a US provider.