Eric Long <[EMAIL PROTECTED]> wrote:
>3. The mailserver then contacts teh first server on teh list, says "here's
>an e-mail message", along with a list of addresses (usually 20 or so).
>Sometimes all those addresses are on that server, somtimes not.
>
>4. To stop spam, the receiver then checks the list for at least one valid
>receiver. if one is local, it delivers it and any other local mails, then
>relays the rest off to the first system in the list left over.
Fascinating... And there are MTA's that support this scheme?
>Qmail is denying legitimate messages to my users because it doesn't allow
>this type of relaying. Why?
qmail denies it because it denies all relaying that's not expressly
permitted. The scheme you describe is vulnerable to spamming simply by
including a local address at the beginning of the list of recipients.
-Dave
