Escape recurring per-user SaaS license fees ($6–$30/user/month on Microsoft 365 or Google Workspace), retain absolute data sovereignty over executive correspondence, and eliminate email deliverability failures.

We deploy and harden a sovereign, high-deliverability enterprise mail infrastructure powered by EVALinux exu Suite, Exim, Dovecot, and Caddy on CentOS Stream 10. Built with a statically compiled Crystal daemon and CLI, exu provides an intuitive Single-Page Application (SPA) web control plane protected by client-certificate mTLS authentication, alongside native command-line administration (eum), automated 2048-bit DKIM key generation, and copy-paste ready DNS records for a guaranteed 10/10 deliverability score.

Zero Per-Seat SaaS Taxes: Host unlimited domains, mailboxes, and aliases on your private server infrastructure without recurring per-inbox fees.

100% Data Privacy & Legal Sovereignty: Retain full ownership of corporate email archives, protected from automated cloud scanning and foreign legal jurisdiction.

Guaranteed 10/10 Deliverability: Perfect inbox placement backed by automated RSA-2048 DKIM signing, strict SPF alignment, DMARC enforcement, and verified rDNS/PTR configuration.

Bank-Grade Security: Decoupled transport mTLS client certificate authentication with encrypted HMAC-SHA256 session cookies, POSIX advisory locking, and non-invasive modular MTA configuration files.