diff --git a/roles/matrix-mailer/templates/systemd/matrix-mailer.service.j2 b/roles/matrix-mailer/templates/systemd/matrix-mailer.service.j2
index cab03128..9345a1d6 100644
--- a/roles/matrix-mailer/templates/systemd/matrix-mailer.service.j2
+++ b/roles/matrix-mailer/templates/systemd/matrix-mailer.service.j2
@@ -19,7 +19,7 @@ ExecStart={{ matrix_host_command_docker }} run --rm --name matrix-mailer \
 			--tmpfs=/var/spool/exim:rw,noexec,nosuid,size=100m \
 			--network={{ matrix_docker_network }} \
 			--env-file={{ matrix_mailer_base_path }}/env-mailer \
-			--hostname={{ matrix_server_fqn_matrix }} \
+			--hostname=matrix-mailer \
 			{% for arg in matrix_mailer_container_extra_arguments %}
 			{{ arg }} \
 			{% endfor %}