Weaknesses
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DKIM signatures do not encompass the message envelope, which holds the return-path and message recipients. Since DKIM does not attempt to protect against mis-addressing, this does not affect its utility. A concern for any cryptographic solution would be message replay abuse, which bypasses techniques that currently limit the level of abuse from larger domains. Replay can be inferred by using per-message public keys, tracking the DNS queries for those keys and filtering out the high number of queries due to e-mail being sent to large mailing lists or malicious queries by bad actors. For a comparison of different methods also addressing this problem see e-mail authentication.
Read more about this topic: Domain Keys Identified Mail
Famous quotes containing the word weaknesses:
“Like most vigorous-minded men, seeing that there was no stopping-place between dogma and negation, he preferred to accept dogma. Of all weaknesses he most disliked timed and half-hearted faith. He would rather have jumped at once to Strong’s pure denial, than yield an inch to the argument that a mystery was to be paltered with because it could not be explained.”
—Henry Brooks Adams (1838–1918)
“My strengths make me contemptuous. My weaknesses make me charitable.”
—Mason Cooley (b. 1927)
“Men are much more unwilling to have their weaknesses and their imperfections known, than their crimes; and, if you hint to a man that you think him silly, ignorant or even ill-bred or awkward, he will hate you more and longer than it you tell him plainly that you think him a rogue.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)