My interpretation is thus:
You have a firewall with a public IP and an private IP
You have a box with email behind that firewall.
When it talks to the world, it should do helo <fqdn> that maps back to
your Firewall's public IP not to a private RFC1918 address.
Regards,KAM
On 1/6/2023 12:00 PM, joe a wrote:
Attempting to utilize the various block lists and find rejection
messages in mail headers "blocked due to usage of an open resolver".
One of many things puzzling me at the moment is something found in the
related Wiki that states "A: Third, if your email gateway is behind a
firewall make sure that SpamAssassin is resolving the gateway to its
external address."
I brazenly confess I have no idea how to check this (or what it means,
in this context).
Figured I should sort out that puzzlement before attempting to install
and configure "unbound" for example.
--
Kevin A. McGrail
kmcgr...@apache.org
Member, Apache Software Foundation
Chair Emeritus Apache SpamAssassin Project
https://www.linkedin.com/in/kmcgrail - 703.798.0171
