adding Postfix Headers

Postfix-Headers.md

@@ -0,0 +1,26 @@
+## Privatizing
+
+Add the following to `/etc/postfix/main.cf`:
+
+```
+mime_header_checks = regexp:/etc/postfix/header_checks
+header_checks = regexp:/etc/postfix/header_checks
+```
+
+Create the recipe `/etc/postfix/header_checks`:
+
+```
+/^Received:.*with ESMTPSA/      IGNORE
+/^X-Originating-IP:/            IGNORE
+/^X-Mailer:/                    IGNORE
+/^Mime-Version:/                IGNORE
+/^User-Agent:/                  IGNORE
+```
+
+Generate the hash map and reload:
+
+```
+postmap /etc/postfix/header_checks
+postfix reload
+```
+

_Sidebar.md

@@ -42,6 +42,7 @@
 - [[NFS 10G Tuning]]
 - [[Netcat Replacements]]
 - [[PAM Namespace]]
+- [[Postfix Headers]]
 - [[Proxmox Doodads]]
 - [[RPM Info]]
 - [[Radeon Temperature]]