diff --git a/roles/mail_server/molecule/default/group_vars/parameters-optional.yml b/roles/mail_server/molecule/default/group_vars/parameters-optional.yml
index 3f94dca6e0a718e9cdc47a94387e915e496d806a..debfa2481db1e838bdad7c44f5d712c8d64d042e 100644
--- a/roles/mail_server/molecule/default/group_vars/parameters-optional.yml
+++ b/roles/mail_server/molecule/default/group_vars/parameters-optional.yml
@@ -36,7 +36,6 @@ mail_server_smtp_additional_configuration: |
 
 # Variables dependant on distribution release.
 release_based_smtp_allow_relay_from:
-  buster: "192.168.56.21"
   bullseye: "192.168.56.41"
 
 # common