diff --git a/ansible/roles/apps/templates/settings/prometheus-stack.yaml b/ansible/roles/apps/templates/settings/prometheus-stack.yaml
index 64bb277757eb3d25fd95eb7f9a227e02c5833e06..013d1c0346b46994b3f99df0c66e35d633b0a9ae 100644
--- a/ansible/roles/apps/templates/settings/prometheus-stack.yaml
+++ b/ansible/roles/apps/templates/settings/prometheus-stack.yaml
@@ -16,7 +16,7 @@ alertmanager:
   config:
     {% if outgoing_mail.enabled %}
     global:
-      smtp_from: "alertmanager@{{ domain }}"
+      smtp_from: "{{ outgoing_mail.fromAddress }}"
       smtp_smarthost: "{{ outgoing_mail.smtp.host }}:{{ outgoing_mail.smtp.port }}"
       smtp_auth_username: "{{ outgoing_mail.smtp.user }}"
       smtp_auth_password: "{{ outgoing_mail.smtp.password }}"