On 25/05/05, Julian Mehnle <bulk(_at_)mehnle(_dot_)net> wrote:
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Julian Mehnle wrote:
Alternatively, DynDNS.org could extend their services and publish such
an "A" record for their customers, for instance under the domain "_spf.
customers.dyndns.org". Then you could use "exists:%{ir}._spf.customers.
dyndns.org" instead.
Uhm, that would have to read "_spf.<dyndns-user-id>.customers.dyndns.org",
in order for each user to have his own "box" of IP address "slots", with
only one "A" record each (matching that exact user's current dynamic IP
address).
That would always exist, and any mail from anyone would pass. :-)
Cheers,
Constantine.