>> "AG" == Arcady Genkin <a.genkin@utoronto.ca> writes: AG> How can I rectify this problem? I know that "Sender" headers are AG> not to blame (read they are not supposed to cause any harm), but AG> in our imperfect world they do. And "Return-path" should be fixed AG> too. At the end of /etc/exim.conf is an example of header rewriting that fixes the from and sender header. Don't know about Return-path though. Ciao, Martin