On Mon, Mar 01, 2021 at 05:28:35PM +0100, Alex via Exim-users wrote: > forwarding connections from a public IP from a VPS towards the private IP of
> my server.
>
> The problem I noticed is that when I receive an email, my server replies to
> the EHLO command like if the sender was my own local server.
Set primary_hostname or smtp_active_hostname. However, SMTP clients
generally takes no care about contents of the connection banner.
This information is valuable to attackers, because it may reveal platform,
name and version of you SMTP listener, and/or some details about your LAN.
> Finally, do you think I should use something different than a socks proxy to
> forward connections?
SMTP greeting may be configured for any forwarding method.
--
Eugene Berdnikov
