diff --git a/roles/mail_forwarder/tasks/main.yml b/roles/mail_forwarder/tasks/main.yml
index dbcb7b9122e81a44cce2147f37539607aa9a6d8a..6e9cb0938f0c411d71b1080ee085eba5547aa04f 100644
--- a/roles/mail_forwarder/tasks/main.yml
+++ b/roles/mail_forwarder/tasks/main.yml
@@ -6,6 +6,10 @@
 - name: Purge Exim configuration
   apt: name="exim4*" state=absent purge=yes
 
+- name: Deploy the SMTP relay TLS truststore
+  copy: content="{{ smtp_relay_truststore }}" dest="/etc/ssl/certs/smtp_relay_truststore.pem"
+        owner=root group=root mode=644
+
 - name: Deploy Postfix main configuration
   template: src="main.cf.j2" dest="/etc/postfix/main.cf"
   notify: