diff --git a/config/mail/postfix-policyd-spf.conf b/config/mail/postfix-policyd-spf.conf
new file mode 100644
index 0000000..3710502
--- /dev/null
+++ b/config/mail/postfix-policyd-spf.conf
@@ -0,0 +1,2 @@
+Whitelist = 192.168.0.0/31,192.168.1.0/30
+Domain_Whitelist = dockerize_internalnet