> This sounds like something your mailer is doing. What does > dspam do with the mail after scanning? Probably you need to > configure whatever it's talking to to trust dspam's user; or > alternatively make dspam inject scanned messages via SMTP/LMTP.
After playing with the users that calls `dspam', I found out that if I set user to exim it works. I finally found out about local_sender_check and local_sender_retain options in exim to learn that all I needed was to add `dspam' to the list of trusted users so that no `Sender' is added and the `Return-path' unmodified. Thanks for your help, Manu
