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Tech riderRev. 7 Oct 2026

Hermes Secure Email Gateway

Ch 047.1of 32 Email Security Gateways
  1. 1Runs onLinux, self-hosted
  2. 2CostsFree plan · free trial · paid from $62.50/mo
  3. 3Outbound filteringYes
  4. 4Malware sandboxingNo
  5. 5Deployment modelgateway
  6. 6Microsoft 365 supportYes
  7. 7Google Workspace supportYes
7 lines stated Written from the maker's own pages: hermesseg.io
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The Hermes Secure Email Gateway homepage

Overview

Hermes Secure Email Gateway is ranked #4 of 32 in email security gateways on Specifiction. It runs on Linux, Self-hosted. There is a free plan. A free trial is offered. Paid plans start at $62.50/mo.

Hermes Secure Email Gateway plans and pricing

All plans
Community Edition Free Free and open-source; self-hosted Docker Compose stack hermesseg.io · 7 Oct 2026
Pro Edition $750/yr Per server; monthly or annually Flat per-server license; protects thousands of mailboxes; free 30-day trial, no credit card required hermesseg.io · 7 Oct 2026

Compared on email security gateways

Free plan
Yeshermesseg.io
Outbound filtering
Yeshermesseg.io
Malware sandboxing
Nohermesseg.io
Deployment model
gatewayhermesseg.io
Microsoft 365 support
Yeshermesseg.io
Google Workspace support
Yeshermesseg.io

Facts

Product
Hermes is a self-hosted Docker Compose stack combining email security, mail hosting, end-to-end encryption, and Nextcloud collaboration.hermesseg.io · 7 Oct 2026
Deployment
It can run as a gateway in front of Microsoft 365, Google Workspace, Exchange, or Postfix, as a full mail server, or in hybrid mode.hermesseg.io · 7 Oct 2026
Filtering
Inbound mail passes through Postfix postscreen and RBL checks, then Amavisd-new orchestrates SpamAssassin and ClamAV scanning.hermesseg.io · 7 Oct 2026
Email authentication
Hermes checks SPF, signs and verifies DKIM, enforces and aggregates DMARC, and signs and verifies ARC.hermesseg.io · 7 Oct 2026
Encryption
It supports SMTP TLS, S/MIME, PGP, encrypted PDF fallback, and Dovecot mail-crypt encryption at rest.hermesseg.io · 7 Oct 2026
Mail hosting
Full-server mode includes Dovecot 2.4 mailboxes, IMAPS, POP3S, Submission, LMTP, per-domain and per-mailbox quotas, shared mailboxes, and Sieve rules.hermesseg.io · 7 Oct 2026
Collaboration integrations
The stack bundles Nextcloud for file sync, webmail, calendars, and contacts, with CalDAV and CardDAV support.hermesseg.io · 7 Oct 2026
Identity and MFA
Authelia provides single sign-on, with TOTP, WebAuthn, and Duo Push multi-factor authentication.hermesseg.io · 7 Oct 2026
Pro features
Pro adds time-of-click Link Guard, email disclaimers, organizational signatures, intrusion-prevention and console-firewall interfaces, and LDAP RemoteAuth.hermesseg.io · 7 Oct 2026
Platform requirements
Hermes requires a Linux host capable of running Docker Engine 24.0 or later and Docker Compose v2.hermesseg.io · 7 Oct 2026
Support
Community support is informal through GitHub forums, the issue tracker, Matrix, and Telegram; direct vendor support requires eligible Pro support coverage or purchased incidents.hermesseg.io · 7 Oct 2026
Audience
The site presents Hermes for SMBs, MSPs, self-hosters, privacy-focused teams, and organizations adding a gateway in front of Microsoft 365 or Google Workspace.hermesseg.io · 7 Oct 2026

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Where it ranks on Specifiction

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