A new SMTP-protocol level spoofing attack was recently published:
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
Proxmox Mailgateway uses postfix as it's mail transport agent, thus the fix for the vulnerability happens in postfix.
postfix upstream details...
We have compiled a collection of best practices and recommendation for Proxmox Mail Gateway deployments on the project page:
https://pmg.proxmox.com/wiki/index.php/Getting_started_with_Proxmox_Mail_Gateway
It contains a few tutorials, and tips, collected from our great community and which we...
We just added a short Howto for creating a proxy exposing the end-user quarantine interface with nginx to the Proxmox Mail Gateway wiki:
https://pmg.proxmox.com/wiki/index.php/Quarantine_Web_Interface_Via_Nginx_Proxy
This can help in providing a more pleasant and comfortable experience for...
We've created a short HOWTO on setting up a recursive DNS Server on Proxmox Mail Gateway installations:
https://pmg.proxmox.com/wiki/index.php/DNS_server_on_Proxmox_Mail_Gateway
This should help achieving better spam detection results on larger installations processing many mails, by
helping...
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