diff --git a/templates/mail_event.mustache b/templates/mail_event.mustache
index 976f236..eeb45c5 100644
--- a/templates/mail_event.mustache
+++ b/templates/mail_event.mustache
@@ -1,3 +1,4 @@
+Return-Path: {{user.email}}
 From: Fake Reservation System <{{user.email}}>
 Subject: [FRS] {{form_type_uc}} Reservation
 Date: {{email_date}}
diff --git a/templates/mail_flight.mustache b/templates/mail_flight.mustache
index f129383..608b34b 100644
--- a/templates/mail_flight.mustache
+++ b/templates/mail_flight.mustache
@@ -1,3 +1,4 @@
+Return-Path: {{user.email}}
 From: Fake Reservation System <{{user.email}}>
 Subject: [FRS] {{form_type_uc}} Reservation
 Date: {{email_date}}
diff --git a/templates/mail_hotel.mustache b/templates/mail_hotel.mustache
index 9207623..312a7f9 100644
--- a/templates/mail_hotel.mustache
+++ b/templates/mail_hotel.mustache
@@ -1,3 +1,4 @@
+Return-Path: {{user.email}}
 From: Fake Reservation System <{{user.email}}>
 Subject: [FRS] {{form_type_uc}} Reservation
 Date: {{email_date}}