diff --git a/roles/docker/tasks/services/postfix.yml b/roles/docker/tasks/services/postfix.yml
index 76c4f59..ece525e 100644
--- a/roles/docker/tasks/services/postfix.yml
+++ b/roles/docker/tasks/services/postfix.yml
@@ -23,6 +23,6 @@
       - "{{ services.postfix.volume_folder }}/dkim:/etc/opendkim/keys"
     env:
       # Get all services which have allowed_sender_domain defined
-      ALLOWED_SENDER_DOMAINS: "{{ base_domain }} {{ services | dict2items | selectattr('value.allowed_sender_domain', 'true') | map(attribute='value.domain') | join(' ') }}"
+      ALLOWED_SENDER_DOMAINS: "{{ services | dict2items | selectattr('value.allowed_sender_domain', 'true') | map(attribute='value.domain') | join(' ') }}"
       HOSTNAME: "{{ services.postfix.domain }}" # the name the smtp server will identify itself as
       DKIM_AUTOGENERATE: "true"