diff --git a/roles/base/files/postfix/main.cf/main.cf.gateway b/roles/base/files/postfix/main.cf/main.cf.gateway
index c4f4d1f627..d5e5c7eefd 100644
--- a/roles/base/files/postfix/main.cf/main.cf.gateway
+++ b/roles/base/files/postfix/main.cf/main.cf.gateway
@@ -292,7 +292,7 @@ unknown_local_recipient_reject_code = 550
 #mynetworks = $config_directory/mynetworks
 #mynetworks = hash:/etc/postfix/network_table
 
-mynetworks = localhost.localdomain, localhost, 127.0.0.1, 10.5.124.128/25, 10.5.125.0/24, 10.5.126.0/24, 10.5.127.0/24, 10.5.128.0/24, 10.5.129.0/24, 10.5.130.0/24, 10.5.131.0/24, 10.5.78.0/24, 10.5.79.0/24, 192.168.0.0/16
+mynetworks = localhost.localdomain, localhost, 127.0.0.1, 10.3.160.0/19, 192.168.0.0/16
 
 # The relay_domains parameter restricts what destinations this system will
 # relay mail to.  See the smtpd_recipient_restrictions description in
diff --git a/roles/opendkim/files/TrustedHosts b/roles/opendkim/files/TrustedHosts
index 111f13b840..9b8d2a2a85 100644
--- a/roles/opendkim/files/TrustedHosts
+++ b/roles/opendkim/files/TrustedHosts
@@ -5,10 +5,7 @@
 # The localhost IP (127.0.0.1) should always be the first entry in this file.
 127.0.0.1
 ::1
-10.5.124.128/25
-10.5.125.0/24
-10.5.126.0/24
-10.5.129.0/24
+10.3.160.0/19
 192.168.0.0/16
 #host.example.com
 #192.168.1.0/24