diff --git a/plinth/modules/email_server/templates/email_alias.html b/plinth/modules/email_server/templates/email_alias.html
index 2298aeeb8..64773f089 100644
--- a/plinth/modules/email_server/templates/email_alias.html
+++ b/plinth/modules/email_server/templates/email_alias.html
@@ -1,5 +1,7 @@
-{# SPDX-License-Identifier: AGPL-3.0-or-later #}
 {% extends "base.html" %}
+{% comment %}
+# SPDX-License-Identifier: AGPL-3.0-or-later
+{% endcomment %}
 
 {% load bootstrap %}
 {% load i18n %}
diff --git a/plinth/modules/email_server/templates/email_server.html b/plinth/modules/email_server/templates/email_server.html
index 9c4909294..0083d1a1a 100644
--- a/plinth/modules/email_server/templates/email_server.html
+++ b/plinth/modules/email_server/templates/email_server.html
@@ -1,5 +1,7 @@
-{# SPDX-License-Identifier: AGPL-3.0-or-later #}
 {% extends "app.html" %}
+{% comment %}
+# SPDX-License-Identifier: AGPL-3.0-or-later
+{% endcomment %}
 
 {% load i18n %}
 
diff --git a/plinth/modules/email_server/templates/my_mail.html b/plinth/modules/email_server/templates/my_mail.html
index bf03fce13..c8974aaa5 100644
--- a/plinth/modules/email_server/templates/my_mail.html
+++ b/plinth/modules/email_server/templates/my_mail.html
@@ -1,5 +1,7 @@
-{# SPDX-License-Identifier: AGPL-3.0-or-later #}
 {% extends "base.html" %}
+{% comment %}
+# SPDX-License-Identifier: AGPL-3.0-or-later
+{% endcomment %}
 
 {% load i18n %}