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John R Levine wrote:
At Author Domain Signing Practices (ADSP) specification, just i'm
wondering about "dkim=discardable" rule. It seems like SPF's "fail". So
i think that's the most powerful policy to keep DKIM's philosophy than
the others. Do I understand correctly about "dkim=discardable"?
Not really. If you use the "discardable" setting, you are telling
people that your mail is not very important, so they should discard it
without reading it if doesn't have a valid signature. This means that
if you send mail through a mailing list, or any other path that happens
to make minor changes to messages that break the signature, people won't
see it.
For example, your message to which I am responding would have a broken
signature due to the tag that the list added to the subject line. If I
were using ADSP, I would have discarded your mail without reading it.
That is probably not what you want.
The number of domains that should use discardable is very small. It's
really only useful for banks and places like Paypal sending out notices
about accounts, not for any domain with individual users.
Ah.. i understood correctly what "dkim=discardable" means. So DKIM
ADSP's "dkim=discardable" rule is same step with SPF's "v=spf1 +all"
rule on Internet.
dig +short _adsp._domainkey.izb.knu.ac.kr. TXT "dkim=discardable\;"
This message has a minor syntax error. There should not be a \
character before the semicolon.
The "\" character isn't my fault. That's just the output of dig.
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
"I dropped the toothpaste", said Tom, crestfallenly.
byunghee
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