Loading ...
Sorry, an error occurred while loading the content.

Re: SMTP sender accepted when from a different domain

Expand Messages
  • John Peach
    On Fri, 30 Aug 2013 15:52:22 -0400 ... You are not restricting to local users, but to anyone claiming to be a local user. $mynetworks is the way to restrict to
    Message 1 of 10 , Aug 30 12:56 PM
    • 0 Attachment
      On Fri, 30 Aug 2013 15:52:22 -0400
      Jean-S├ębastien Nicaise <jsnicaise@...> wrote:

      > On Fri, Aug 30, 2013 at 3:48 PM, John Peach <postfix@...> wrote:
      >
      > > On Fri, 30 Aug 2013 15:43:01 -0400
      > > Jean-S├ębastien 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?

      You are not restricting to local users, but to anyone claiming to be a
      local user. $mynetworks is the way to restrict to local users, or use
      authentication.



      --
      John
      PGP Public Key: 412934AC
    Your message has been successfully submitted and would be delivered to recipients shortly.