Le Monday 25 August 2003 23:29, Buchan Milne a �crit : > WARNING: Unsanitized content follows. > > Guillaume Rousse wrote: > >>And the MTA should not snd any messages back when this is done, as the > >>sender most likely is not the real sender. > > > > the REJECT directive here just send the mail back to the real sender > > during > > > the STMP transaction, which is the virus here. > > Only when the client is sobig.f itself, if the client is another SMTP > server's client daemon, the user listed in "From" will get a message > from the client daemon :-(. False (not true). When the mail is reject, the MTA doesn't send back the mail. It's the other MTA to implement an action to send back the mail to the return-path. And sobig-f cannot do that itself (he has is own minimalist MTA) So, using reject doesn't send a mailer daemon in this case. (if youuse a two stage MX, you'll have to drop the mail on the first MX.) But you will find *a lot* of filter/antivirus/etc who will detect the virus, and send back to the return-path, a notice. and *this* is annoying.
Emmanuel
