diff --git a/src/pretix/settings.py b/src/pretix/settings.py
index 533374fd2c..e2f3f0e5d4 100644
--- a/src/pretix/settings.py
+++ b/src/pretix/settings.py
@@ -81,6 +81,7 @@ EMAIL_HOST_USER = config.get('mail', 'user', fallback='')
 EMAIL_HOST_PASSWORD = config.get('mail', 'password', fallback='')
 EMAIL_USE_TLS = config.getboolean('mail', 'tls', fallback=False)
 EMAIL_USE_SSL = config.getboolean('mail', 'ssl', fallback=False)
+EMAIL_SUBJECT_PREFIX = '[pretix] '
 
 ADMINS = [('Admin', n) for n in config.get('mail', 'admins', fallback='').split(",") if n]