RE: Question about "spoofing" emails.

From: Juan Pablo Calomino (no email)
Date: Thu Mar 01 2007 - 13:30:24 EST

  • Next message: Victor Duchovni: "Re: Postfix rejecting NDRs with 501 5.5.4 Bad message size syntax ?"

    --- MrC <> escribió:

    >
    > > I have one question for you.
    > >
    > > How do you do to avoid this kind of thing?
    > >
    > > 220 -Empresa de Servicios - XXXXXXX
    > > helo mundo
    > > 250 SERVER02.xxxxxxxx.com.ar
    > > mail from: <>
    > > 250 Ok
    > > rcpt to: <>
    > > 250 Ok
    > > data
    > > 354 End data with <CR><LF>.<CR><LF>
    > > FROM: John User <>
    > > TO: <>
    > > SUBJECT: Nada
    > >
    > > Muerte!
    > > .
    > > 250 Ok: queued as 972C55865D
    > >
    > > I think that it's too difficult to get rid of this
    > type of
    > > mails, filtering may reject valid emails...
    > >
    > > I hear any suggestions!
    >
    > What specifically is "this kind of thing" ? The
    > "mundo" HELO parameter?
    > The "" MAIL FROM envelope?
    >
    > Please be more specific about what you are trying to
    > reject.
    >
    > MrC
    >
    >

    Sorry, I'm talking about the DATA part:

    data
    FROM: John User <>
    TO: <>
    SUBJECT: Nada.

    John User may think that his mailbox is being used,
    because in the mail he sees that the sender is
    himself, and he doesn't know about MIME.
    I explain that it is fake, so he asks me to try to
    stop this "spoofed" emails.
    And here I am, trying to find ways to stop these
    mails, without stopping valid mails.

    Thanks!
    Juan Pablo.

            

            
                    
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  • Next message: Victor Duchovni: "Re: Postfix rejecting NDRs with 501 5.5.4 Bad message size syntax ?"





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