Zimbra Email Consulting & Administration

Zimbra Collaboration Suite remains a top choice for organizations seeking open-source, self-hosted email and collaboration without Microsoft 365 or Google Workspace costs. Zwiegnet provides expert deployment, optimization, and ongoing support for Zimbra on Linux, ensuring high uptime, security, and scalability.

Our Zimbra services include:

• Zimbra Installation & Configuration – Full setup on AlmaLinux, Rocky, Ubuntu LTS; single-server or multi-node clustered deployments.
• High Availability & Clustering – Active/active or active/passive clusters, load balancing, shared storage (NFS/ZFS), and automatic failover for zero-downtime email.
• Security Hardening – TLS 1.3 enforcement, certificate management, two-factor authentication, firewall rules, and protection against brute-force attacks.
• Spam & Virus Protection – Amavis, SpamAssassin, ClamAV tuning; DKIM/DMARC/SPF configuration, and advanced filtering policies.
• Migration & Data Import – Migrate from Microsoft Exchange, Office 365, Google Workspace, or legacy systems; mailbox import, calendar/contacts sync, and minimal downtime cutover.
• Integration & Customization – LDAP/Active Directory integration, SSO (SAML), mobile device management, and API/webhooks for custom workflows.
• Backup & Disaster Recovery – Zimbra native backups, Zextras backup, off-site replication, and tested recovery procedures.
• Performance Tuning & Monitoring – Mailbox server tuning, MTA optimization, Prometheus/Grafana monitoring, and scaling for thousands of users.

Ideal for: small-to-mid-sized businesses, schools, non-profits, law firms, healthcare practices, and enterprises seeking secure, private, self-hosted email and collaboration without subscription lock-in.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to Zimbra specialists with proven experience in self-hosted email environments on Linux.