[Mimedefang] Deadline for SPF records
Cor Bosman
cor at xs4all.nl
Tue Aug 10 16:16:10 EDT 2004
> >Let's say that I work for a hypothetical ACME Widgets, Inc. My e-mail
> >address is sales at acmewidgets.com. A potential customer,
> >bob at example.com, tries to send me an e-mail message from his laptop
> >using a public access point in his hotel. The network he's on is not
> >listed as an allowed relay for example.com, according to their SPF
> >record. My administrator (at acmewidgets.com) is honoring SPF
> >records. What happens?
>
> That's just it - if your sales guy is at hotel with his laptop, he could
> use AUTH/STARTTLS and actually relay through his company's mail server.
> Thus the email from sales at acmewidgets.com would be delivered by
> mail.acmewidgets.com to where it needed to go... SPF would be valid. This
> no bounce at the destination.
You try and tell that to thousands of customers. Who had their laptops
set up in 1997 by a company that has long gone bankrupt. And will sue
you if suddenly their email isnt working anymore :)
Welcome to the world of ISPs :)
Cor
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