diff --git a/roles/base/files/postfix/main.cf/main.cf b/roles/base/files/postfix/main.cf/main.cf
index 553d51196c..e74bcd7ef1 100644
--- a/roles/base/files/postfix/main.cf/main.cf
+++ b/roles/base/files/postfix/main.cf/main.cf
@@ -684,3 +684,4 @@ readme_directory = /usr/share/doc/postfix-2.4.5/README_FILES
 
 
 message_size_limit = 20971520
+inet_protocols = ipv4
diff --git a/roles/base/files/postfix/main.cf/main.cf.phx b/roles/base/files/postfix/main.cf/main.cf.phx
index f3c260f736..667ff86c61 100644
--- a/roles/base/files/postfix/main.cf/main.cf.phx
+++ b/roles/base/files/postfix/main.cf/main.cf.phx
@@ -684,3 +684,4 @@ readme_directory = /usr/share/doc/postfix-2.4.5/README_FILES
 
 
 message_size_limit = 20971520
+inet_protocols = ipv4