Allow distinct FROM addresses for envelope and header

issue9948
review324741004

user.py

@@ -40,14 +40,13 @@ logger = logging.getLogger(__name__)
 
 
 def _send_email(from_, users, email_func):
-    if from_ is None:
-        from_ = config.get('email', 'from')
+    from_cfg = config.get('email', 'from')
     for user in users:
         msg, title = email_func(user)
-        msg['From'] = from_
+        msg['From'] = from_ or from_cfg
         msg['To'] = user.email
         msg['Subject'] = Header(title, 'utf-8')
-        sendmail_transactional(from_, [user.email], msg)
+        sendmail_transactional(from_cfg, [user.email], msg)
 
 
 def _add_params(url, **params):