Cédric Chausson <cchausson@xxxxxxx> writes: > Hello all, > > I get returned mails from the mailer-daemon. It says could not send > mail because > > ----- The following addresses had permanent fatal errors ----- > <Cedric.Chausson@xxxxxxx> > (reason: 553 5.1.8 <root@xxxxxxxxxxxxxxxxxxxxx>... Domain of > sender address root@xxxxxxxxxxxxxxxxxxxxx does not exist) > > Any ideas ? > I see two things. You need to masquerade the envelope And probably use generictable to get rid of root as the user id. Redhat used to have a nice little descrition of how to masquerade the envelope on www.redhat.com in the support area. Not sure if its still there. But a google groups search on comp.mail.sendmail would probably give some hits on a search string of: +masquerade +envelope Its also in the sendmail faq somewhere on www.sendmail.com A little searching on www.redhat.com turned this up: http://www.redhat.com/support/resources/howto/RH-sendmail-HOWTO/c239.html Is it useful?