"ladidalimey" <email@example.com> wrote in message news:firstname.lastname@example.org... >I am using sendmail to send out emails. It has worked fine for months. >Recentley it has developed and issue where it sends out about 5 emails and >then crashes with the following message: > > ??? Error using ==> sendmail at 168 > Authentication failed. > > My outlook express account which uses the same account and setup continues > to work fine. > > Any ideas?? > > Thanks L.