diff --git a/flask_security/core.py b/flask_security/core.py
index 3f2008a..c05ddaa 100644
--- a/flask_security/core.py
+++ b/flask_security/core.py
@@ -56,6 +56,7 @@ _default_config = {
     'TRACKABLE': False,
     'PASSWORDLESS': False,
     'CHANGEABLE': False,
+    'SEND_REGISTER_EMAIL': True,
     'LOGIN_WITHIN': '1 days',
     'CONFIRM_EMAIL_WITHIN': '5 days',
     'RESET_PASSWORD_WITHIN': '5 days',
diff --git a/flask_security/registerable.py b/flask_security/registerable.py
index fc07574..4e9f357 100644
--- a/flask_security/registerable.py
+++ b/flask_security/registerable.py
@@ -36,7 +36,8 @@ def register_user(**kwargs):
     user_registered.send(dict(user=user, confirm_token=token),
                          app=app._get_current_object())
 
-    send_mail(config_value('EMAIL_SUBJECT_REGISTER'), user.email, 'welcome',
-              user=user, confirmation_link=confirmation_link)
+    if config_value('SEND_REGISTER_EMAIL'):
+        send_mail(config_value('EMAIL_SUBJECT_REGISTER'), user.email, 'welcome',
+                user=user, confirmation_link=confirmation_link)
 
     return user