Re: SMTP sender accepted when from a different domain
- On Fri, 30 Aug 2013 15:52:22 -0400
Jean-Sébastien Nicaise <jsnicaise@...> wrote:
> On Fri, Aug 30, 2013 at 3:48 PM, John Peach <postfix@...> wrote:You are not restricting to local users, but to anyone claiming to be a
> > On Fri, 30 Aug 2013 15:43:01 -0400
> > Jean-Sébastien Nicaise <jsnicaise@...> wrote:
> > [snip]
> > >
> > > I'm hoping for something simple like: user sends an email. Postfix looks
> > at
> > > MAIL FROM. Is the email address part of $mydomain? if so, relay mail. If
> > > not, don't relay mail.
> > You really, really do NOT want that. Anyone can then spoof your address
> > and you are an open relay.
> > --
> > John
> > PGP Public Key: 412934AC
> How would restricting local users make me an open relay?
local user. $mynetworks is the way to restrict to local users, or use
PGP Public Key: 412934AC