Practical, hands-on guides to deploying and running a self-hosted secure email gateway with Hermes Secure Email Gateway. Each guide covers the architecture and the decisions; the exact step-by-step configuration lives in the Administrator Guide.
-
Secure Email Gateway for Microsoft 365
Put an independent filtering layer in front of M365, and drop the per-user Defender for Office 365 add-on for a flat per-server cost. Covers connectors, tenant lockdown, SPF/DKIM/DMARC, and the ARC gotcha.
-
Secure Email Gateway for Google Workspace
Front Gmail with a gateway instead of upgrading every seat to a higher Workspace tier. Inbound gateway setup, outbound routing, and getting authentication right.
-
SPF, DKIM, DMARC & ARC: Email Authentication Explained
What each standard does, the order to deploy them, the common mistakes that block your own mail, and how a gateway handles signing and ARC sealing for you.
-
S/MIME & PGP Email Encryption
Transparent, gateway-applied encryption: auto-encrypt outbound, auto-decrypt inbound, encrypted-PDF fallback, or pass-through end-to-end. Included in the free Community Edition.