[SOLVED] User address in mail header

[DerDanilo]

We found a weird issue on several PMGs filtering mails exposing other users addresses in the mail header.
This is GDPR wise an absolute fail and should be fixed asap.
Apparently the spam header lists "Sender email is commonly abused enduser mail provider (......... list of other users mailaddresses)".

Green = User address - From and Reply-to
Red = Other users mail addresses forwarding mails to or receiving mails from PMGs.



We've had several customers reporting this issues. No legal charges are yet claimed but this is a pressing issue.

How can we solve this globaly?

Thanks in advance!

 

[Stoiko Ivanov]

This was fixed in September - https://pve.proxmox.com/pipermail/pmg-devel/2019-September/000548.html
proxmox-spamassassin (>= 3.4.2-12) contains the fix.
The package is available on all pmg 6.0 repositories.

I hope this helps!

 

[DerDanilo]

Thanks for the reply, then this is most probably fixed already. Our PMGs are up to date.

 

[Stoiko Ivanov]

If you've upgraded to PMG 6.0 that should be the case! - you can check - the version of proxmox-spamassassin needs to be 3.4.2-12
(`dpkg -l |grep proxmox-spamassassin`)