diff --git a/src/bornhack/settings.py b/src/bornhack/settings.py
index fec21e331..35007dec3 100644
--- a/src/bornhack/settings.py
+++ b/src/bornhack/settings.py
@@ -131,6 +131,7 @@
 ACCOUNT_EMAIL_SUBJECT_PREFIX = "[bornhack] "
 ACCOUNT_SIGNUP_FORM_HONEYPOT_FIELD = "gender"
 ACCOUNT_SIGNUP_FIELDS = ["email*", "password1*", "password2*"]
+ACCOUNT_EMAIL_UNKNOWN_ACCOUNTS = False
 
 LOGIN_REDIRECT_URL = "/"
 LOGIN_URL = "/login/"