diff --git a/roles/mail_server/molecule/default/molecule.yml b/roles/mail_server/molecule/default/molecule.yml
index 00c7dfe1e4971fed2c31fd265d0c38dbd530e7e7..e0645d4a568b0cbd6838f67648a84a72461030c1 100644
--- a/roles/mail_server/molecule/default/molecule.yml
+++ b/roles/mail_server/molecule/default/molecule.yml
@@ -50,74 +50,6 @@ platforms:
         type: static
 
 
-  # Debian 10 Buster
-  # ================
-
-  - name: client1-buster
-    groups:
-      - client
-      - client-relay-allowed
-      - buster
-      - smtp-server-requiring-tls
-    box: debian/contrib-buster64
-    memory: 256
-    cpus: 1
-    provider_raw_config_args:
-      - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
-    interfaces:
-      - auto_config: true
-        ip: 192.168.56.21
-        network_name: private_network
-        type: static
-
-  - name: client2-buster
-    groups:
-      - client
-      - client-relay-forbidden
-      - buster
-      - smtp-server-refusing-tls
-    box: debian/contrib-buster64
-    memory: 256
-    cpus: 1
-    provider_raw_config_args:
-      - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
-    interfaces:
-      - auto_config: true
-        ip: 192.168.56.22
-        network_name: private_network
-        type: static
-
-  - name: parameters-mandatory-buster
-    groups:
-      - parameters-mandatory
-      - buster
-    box: debian/contrib-buster64
-    memory: 2048
-    cpus: 1
-    provider_raw_config_args:
-      - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
-    interfaces:
-      - auto_config: true
-        ip: 192.168.56.31
-        network_name: private_network
-        type: static
-
-  - name: parameters-optional-buster
-    groups:
-      - parameters-optional
-      - buster
-    box: debian/contrib-buster64
-    memory: 2048
-    cpus: 1
-    provider_raw_config_args:
-      - "customize ['modifyvm', :id, '--paravirtprovider', 'minimal']"
-    interfaces:
-      - auto_config: true
-        ip: 192.168.56.32
-        network_name: private_network
-        type: static
-
-
   # Debian 11 Bullseye
   # ================