Do not set sender when sending from weblate, set reply-to instead

accounts/views.py

@@ -91,7 +91,9 @@ def mail_admins_sender(subject, message, sender, fail_silently=False,
 
     mail = EmailMultiAlternatives(
         u'%s%s' % (settings.EMAIL_SUBJECT_PREFIX, subject),
-        message, sender, [a[1] for a in settings.ADMINS],
+        message,
+        to=[a[1] for a in settings.ADMINS],
+        headers={'Reply-To': sender},
         connection=connection
     )