Home - Deeztek, LLC Free Open Source Unified Secure Email Gateway. Hermes Secure Email Gateway combines technologies such as Postfix, Apache SpamAssassin, ClamAV, Amavisd-new, MySQL and CipherMail under one unified web based Web GUI for easy administration and management of your incoming and ougoing email for your organization. Anti-spam, anti-virus and anti-malware protection, PGP Encryption, S/MIME Encryption, PDF Encryption and SMTP TLS support, built-in email archiving, end-user self-service web gui are just some of the available features.