Hide internal adresses from the messages headers before they go out

[Guest]

[o.hintzsche]

Hello,

Our internal Mailserver relay through the smtp mail gateway of our endian firewall. Is there a way to remove or hide the hostnames and IP addresses of our internal systems from the messages headers before they go out?

Thanks in advance!

o.hintzsche

[o.hintzsche]

Hello again,

The endian firewall use postfix for mail delivery.

So this is how I've done it:

add to /etc/postfix/main.cf

header_checks = regexp:/etc/postfix/header_checks

then add to /etc/postfix/header_checkst

"# Header checks file
/^received: / IGNORE
/^X-Sender: / IGNORE
"
that removes the sender-header before deliver it to the internet.

[..::Bit71::..]

if resolve, can you change the subjet, put in  of the phrase, the word [RESOLVED] ?

thanks