At 05:15 AM 6/2/2004, Ben Laurie wrote:
SPF will buy me one thing forever: I won't get email telling me I sent
people spam and viruses.
Unfortunately, that won't work for me.
My email address is at pobox.com, the mail forwarding service
where the main proponent of SPF works,
but my SMTP service is whichever ISP I'm currently connected through
(DSL, dial, work, whatever) - which isn't under pobox's control.
So my incoming mail can recognize SPFs and block forgeries,
but my outgoing mail can't use them,
unless pobox changes their business model to provide outgoing SMTP relay
for their customers, doubling their bandwidth needs.
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