>SL> Uhm, who not do that in the MUA? > >Because you don't always use a MUA when you send mails. Take the bug >package for example, which will help in sending a bug report. Without >such a rewrite, it will send the bug, using a bogus from-address, and >the maintainer can't contact the submitter for further info. > >This is why I also rewrite the from header with smail. Is the header rewritten even when sending locally? Do you know how that is done with exim?