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Wayne Schlitt wrote:
Julian Mehnle writes:
"quite a few" -- about how large a percentage of all the SPF-equipped
domains is that? I'd be really interested.
Uh....
You have released Mail::SPF to the public. Surely, you have tested
this code on a large number of domains under varying conditions.
Surely, the response you should be giving now is "my study of <x>
domains show <y>% failures, what are your results?" Along with "is
<y>% really qualify as 'quite a few'?"
No, I haven't. Why would I have done that? Please suggest a methodology
for "testing this code on a large number of domains under varying condi-
tions" that would have helped with verifying the correctness of Mail::SPF
(besides making sure it doesn't outright crash). I don't see any.
(Before releasing it, I ran Mail::SPF on my own mail server for about a
week, which handles several thousand mails per day (most of which is spam,
as usual), though.)
I used to have a list of domains that would answer correctly for A
and MX records, but for TXT, they would timeout. The number was quite
small and since I did the study several years ago, I don't have the
numbers handy. IIRC, it was somewhere around 1 in 10,000 domains.
Unfortunately, besides this study's outdatedness, that doesn't say much
about the degree of support for the SPF RR type.
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