Puzzle for me

[Keith Miller]

Here is the situation, I lived in Germany for 3 years and therefore a fritz.box was used
I am now in the States and my HELO is showing the following
72.196.xx.xxx 2026-10-01 02:00:00 pbs.fritz.box
72.196.xx.xxx 2026-09-29 16:25:00 pbs.fritz.box
72.196.xx.xxx 2026-09-26 02:00:00 pbs.fritz.box
72.196.xx.xxx 2026-09-13 22:00:00 pbs.fritz.box
72.196.xx.xxx146 2026-09-08 17:00:00 pbs.fritz.box

My mail server was not installed while living there only Proxmox where could the Fritz.box have gotten into my proxmox or does anyone have suggestions on where I might find the entry
Ver: Virtual Environment 9.2.20

It is causing my mail server to be listed on spamhaus

Keith Miller

 

[Impact]

I'd start with something like this

grep -sR "fritz.box" /etc /root /home

 

[Keith Miller]

This is the result
comes back with nothing, so my rough guess it does not reside in proxmox

Keith