diff --git a/core/config/postfix.main.cf b/core/config/postfix.main.cf
index 3b5d2b4..75c67b0 100644
--- a/core/config/postfix.main.cf
+++ b/core/config/postfix.main.cf
@@ -33,7 +33,7 @@ alias_maps = hash:/etc/aliases
 alias_database = hash:/etc/aliases
 mydestination = /etc/mailname, localhost.localdomain, localhost
 relayhost =
-mynetworks = 127.0.0.0/8 [::1]/128 [2a01:4f8:121:50d2::2]/128
+mynetworks = 127.0.0.0/8 [::1]/128
 mailbox_size_limit = 0
 recipient_delimiter = +