Frank Ellermann wrote:
Okay, I guess <http://www.openspf.org/Modifier/exp>
could say a tiny bit more about this topic... ;-)
Thanx
[[ Personally I think exp= and %{l} are some of the
two worst ideas in SPF, exists: and SOFTFAIL are
also dubious. Considering how many folks get mx
wrong, while Doug invents DDoS scenarios based
on mx and %{l}, I'm ready to add mx to the list,
as long as RMX stays in the credits... ;-) ]]
I may agree about the cosmetic nature of exp= and %{l}, but exists: is
not dubious at all, as it enables complete control over authorized
senders. For example, one could configure a server so as to
automatically add a remote client's IP to various DNS records upon IP
assignment, possibly including A, MX, and PTR besides accomplishing
the exist: mechanism. That would allow to go along with the wishes of
those folks who run an MTA on their laptops...
The rest of your note is rather puzzling... you must refer to the mx
mechanism, not the mx record type, but why RMX?? You mean the old
http://www.tools.ietf.org/html/draft-danisch-dns-rr-smtp-04 ?
BTW, that link in http://old.openspf.org/rfcs.html is broken.
What about changing the section title to something like
== '''Why'''-service URL in Explanation modifiers
Which section, the remark in FAQ/I18N ?
I meant "SPF Internationalization". Actually both words in the current
section title (the 2nd one in its abbreviated form) appear already in
the titles hierarchically above that section, i.e. page and site.
It can get
a link to Modifier/exp, and Modifier/exp can explain
the fine print of upper case macros with an example.
Great!
[dummy vs. _spf labels]
It could be clarified in the text that it doesn't
have to be "_spf". There are chances that the string
exemplified is pasted in the zone file "as is"
Which string, dummy.your.domain.example ? If an ISP
tries to use that as is it's no ISP, problem solved ;-)
Hmm... I regret I just canceled the quoting about oem&computer,
otherwise I could mention that as a counter example ;-)
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