Das Open-Source Mail Gateway von Proxmox, wurde vor kurzem in der Versoin 6.1 veröffentlicht. Das Update bringt folgende Neuerungen:

• Support für Debian Buster 10.2
• Support des Kernel 5.3 inkl. ZFS
• Support für DomainKeys Identified Mail (DKIM)
• neue Quarantäne für Dateianhänge
• anpassbare Scores für SpamAssassin mittels GUI
• verbesserte Handhabung für die Konfiguration von Regeln im cluster
• noch Experimental ist das Feature “Before Queue”, das extra aktiviert werden kann

Proxmox Mail Gateway 6.1 Release Notes

• Based on Debian Buster (10.2)
  • Proxmox Mail Gateway is based on the latest stable release of Debian 10.2 (Buster).
• Updated SpamAssassin rules
• Kernel 5.3
  • Proxmox Mail Gateway shares the kernel with Proxmox VE and is based on the 5.3 series from Ubuntu 19.10
• DKIM-Signing
  • Support for adding DomainKeys Identified Mail (DKIM) Signatures (RFC 6376) to outbound emails
  • Configuration via GUI
  • Signing happens after processing the email with the rule system, thus ensuring that it leaves the Proxmox Mail Gateway with a valid signature
  • Flexible control of which domains should get signed with sensible defaults (the relay domains)
  • Inside a cluster, one common selector minimizes the overhead for adding required DNS entries
• Attachment Quarantine
  • The Remove Attachments action can now optionally deliver the complete email to the Attachment Quarantine
  • The Attachment Quarantine offers a comfortable GUI for selectively downloading parts of the email for further analysis, or delivering the mail to the original recipient
  • Accessible only by the administrators, it offers safety from accidentally open malicious executables, doc-files, and other attachments infected with malware
• Adjustable SpamAssassin Rule Scores via GUI
  • Adapt the scores of individual SpamAssassin rules directly in the GUI
  • Enables you to adapt the scoring to your environment, thus achieving better ham/spam detection rates
  • Mostly for adding a bit of weight to rules, which are good indicators for Spam in your environment
  • Selectively disable Rules, which cause false positives for your environment
• Improved handling of Configuration and Rule changes in clustered environments
  • The Filtering Engine gets notified about a range of configuration changes which require a reload
  • The notification is propagated during the cluster sync
  • This reduces the situations where you had to manually restart pmg-smtp-filter
• Experimental Support for Before Queue filtering
  • Proxmox Mail Gateway can now optionally reject an email during the SMTP dialogue, instead of accepting it and silently discarding unwanted email
  • This is a requirement in certain situations
  • By answering with a permanent failure code (554), there is no need to generate a Non-Delivery Report, which could cause your system to get blacklisted, due to Backscatter
  • Currently incompatible with the Tracking Center, thus needs to be explicitly enabled in /etc/pmg/pmg.conf
• Improvements to general usability
  • Clarification of ambiguously used terms in the GUI and documentation
  • More detailed documentation of the Service Configuration Templates
  • Downloading of emails larger than 2 MB as eml from the Spam Quarantine now works
  • API-Viewer now usable from inside every running PMG installation at https://pmg.local:8006/api-viewer/index.html or just online via https://pmg.proxmox.com/pmg-docs/api-viewer/index.html

Quelle: https://forum.proxmox.com/threads/proxmox-mail-gateway-6-1-released.60788/