diff --git a/core/config/dovecot.master b/core/config/dovecot.master
index da3879d..0de9f11 100644
--- a/core/config/dovecot.master
+++ b/core/config/dovecot.master
@@ -1,4 +1,4 @@
-listen = "[::]"
+listen = "*, [::]"
 
 service imap-login {
   inet_listener imap {
diff --git a/core/config/postfix.main.cf b/core/config/postfix.main.cf
index c1de343..bebb78f 100644
--- a/core/config/postfix.main.cf
+++ b/core/config/postfix.main.cf
@@ -5,7 +5,7 @@
 # is /etc/mailname.
 #myorigin = /etc/mailname
 
-inet_protocols = ipv6
+inet_protocols = all
 
 smtpd_banner = $myhostname ESMTP $mail_name
 biff = no