header_from_different_domains

  1. A

    PMG - Broken forwarding (No SRS). How to filter when Envelope Sender is overwritten?

    Hi, I have a problem with a specific mail flow. My provider (home.pl) forwards emails to my PMG, but it doesn't support SRS. Instead, it overwrites the Envelope Sender (MAIL FROM) and X-Sieve-Redirected-From with the recipient's address. Because of this, PMG sees every email as "internal"...
  2. L

    improve header manipulation detection

    Hi, we are currently running proxmox mail gateway 6.4-4 and an exchange server 2019 fully patched. the patch for the hafnium exploit was installed as soon as possible. the proxylogon script for exchange did not find any vulnerabilities we recently received an email from an external sender that...