[OT] - Configure sendmail to drop incoming unknown user emails

[Eduardo Casarero]

2010/5/20 Scott Silva <ssilva at sgvwater.com>

> on 5-19-2010 5:57 PM Miguel Koren O'Brien de Lacy spake the following:
> > Ladies and Gentlemen;
> >
> > I need to configure sendmail to silently drop emails received for
> > unknown users on the server. In other words I don't want the sender to
> > thinks that the email was received and then I want to put it in
> > /dev/null. This is not for special needs for an internal application and
> > not for any real interset email server. I searched around about how to
> > do this and found some links that seem to imply that it's possible but
> > no real solution. Can anyone point me to the right place for this?
> >
> > Thanks.
> >
> > Miguel
> >
> Sendmail should be doing this already... You have changed something to make
> it
> NOT reject unknown users.
>
>
Sendmail can "discard" the email, in fact in access.db you can setup for
example "From: 1.2.3.4 DISCARD" so every email from that ip is silently
discarded. How do you now if an user is either valid or not? Ldap?


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