Jim Ramsay wrote:
Za'mbori, Zolta'n wrote:
Steve +1 608 278 7700 wrote:
I'm suggesting that SPF be modified to compare the client IP address to
an address in a new SMTP service extension designed for that purpose,
*if* *present*, and otherwise against the envelope return address.
MAIL FROM:<AT envelope-sender:envelope-return AT example>
Perhaps the ESMTP 'Mail-parameters' of RFC2821 are a better way to do
this than "source routing", since source routing will still mean
something to non-modern MTAs.
Do You think that there are significant number of non-modern MTAs are
connected to the Internet with relaying enabled in the configurations?
To combine both ideas, in a way:
MAIL FROM:<envelope-return AT example> RESSEN envelope-sender
if the SMTP server offers the RESSEN extension.
It is an acceptable idea for me, but it is clear that all of the
involved MTAs need to upgrade.
It is better/easier to change non-modern MTAs to modern MTAs. Or not?
z2
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