[kwlug-disc] Self-hosted email leaks home IP address

[Chris Frey]

On Tue, Mar 10, 2026 at 04:37:17PM -0400, Chris Irwin via kwlug-disc wrote:
> Question: What is your mail setup?
> 
> I'm assuming:
> 
> 1. Self-hosted SMTP on "cloud" somewhere, with a public IP address
> 
>    That SMTP server is public, it's IP is your domain's mx server, etc.
> 
> 2. You as a client, sending outbound via (presumably authenticated) SMTP
> 
>    Your public SMTP server does the "normal" thing of adding a    "received"
> header

If this is the case, you can setup a vpn between your home network
and the SMTP network, so that only private addresses show up in
the Received header.

- Chris