diff --git a/docs/u_e-postfix-postscreen_whitelist.md b/docs/u_e-postfix-postscreen_whitelist.md
new file mode 100644
index 000000000..4f10c8f46
--- /dev/null
+++ b/docs/u_e-postfix-postscreen_whitelist.md
@@ -0,0 +1,3 @@
+IPs can be removed from Postscreen and therefore _also_ from RBL checks in `data/conf/postfix/postscreen_access.cidr`.
+
+Postscreen does multiple checks to identify malicious senders. In most cases you want to whitelist an IP to exclude it from blacklist lookups.
diff --git a/mkdocs.yml b/mkdocs.yml
index a457d4005..f06356c74 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -65,6 +65,7 @@ nav:
       - 'Tagging': 'u_e-mailcow_ui-tagging.md'
       - 'Two-Factor Authentication': 'u_e-mailcow_ui-tfa.md'
   - 'Postfix':
+      - 'Whitelist IP in Postscreen': 'u_e-postfix-postscreen_whitelist.md'
       - 'Disable Sender Addresses Verification': 'u_e-postfix-disable_sender_verification.md'
       - 'Max. message size (attachment size)': 'u_e-postfix-attachment_size.md'
       - 'Statistics with pflogsumm': 'u_e-postfix-pflogsumm.md'