diff --git a/mamweb/settings_test.py b/mamweb/settings_test.py
index a16b36bf..74fe5034 100644
--- a/mamweb/settings_test.py
+++ b/mamweb/settings_test.py
@@ -69,3 +69,8 @@ LOGGING['handlers']['registration_logfile']['filename'] = '/home/mam-web/logs/te
 LOGGING['handlers']['registration_error_log']['filename'] = '/home/mam-web/logs/test/registration_errors.log'
 
 FILE_UPLOAD_PERMISSIONS = 0o440
+
+# Testování e-mailů
+EMAIL_BACKEND = 'mamweb.various.mail_prefixer.PrefixingMailBackend'
+# TODO Pouze na otestování testu… Zvolit konferu, případně může být i seznam
+TESTOVACI_EMAILOVA_KONFERENCE = 'jonas.havelka@volny.cz'
diff --git a/various/mail_prefixer.py b/various/mail_prefixer.py
new file mode 100644
index 00000000..76545bc3
--- /dev/null
+++ b/various/mail_prefixer.py
@@ -0,0 +1,21 @@
+"""A simple email backend, which only prepends all subjects with a string.
+
+Used to distinguish testing emails from production ones."""
+
+# We try to monkeypatch django.core.mail.backends.smtp :-)
+
+from django.core.mail.backends.smtp import EmailBackend as DjangoSMTPBackend
+from django.conf import settings
+
+class PrefixingMailBackend(DjangoSMTPBackend):
+	# method _send is not probably meant to be monkey_patched, so we patch send_messages instead.
+	def send_messages(self, messages):
+		prefix = '[Mail z testwebu]'
+		for message in messages:
+			# We hope that this is a django.core.mail.message.EmailMessage
+			message.subject = prefix + ' ' + message.subject
+			message.body = "Bylo by posláno na e-maily: " + str(message.recipients()) + "\n" + message.body
+			message.to = settings.TESTOVACI_EMAILOVA_KONFERENCE
+			message.cc = []
+			message.bcc = []
+		return super().send_messages(messages)