Bob wrote:
I do see in the headers of your reply that the first "Received:"
header uses "HiddenHostname" ... but also the FQDM(?) of your
Verizon connection
FQDN, in this case for a dynamically assigned address so not very useful to
anyone other than Verizon. Though they choose to provide a geographic hint,
and "fios", in the name.
So, while I could hide the hostname of my laptop, I wouldn't be
able to hide its "public"/ISP-assigned name (and IP address).
Right, as Tom noted:
Received: lines are generally added by each MTA that the message
passes through. In this case it was smtp.gmail.com that added that;
it's not under your control. You can probably modify the "Hikaru"
David
https://lists.nongnu.org/archive/html/nmh-workers/2021-03/msg00012.html