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.
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Famous quotes containing the word weaknesses:
“My strengths make me contemptuous. My weaknesses make me charitable.”
—Mason Cooley (b. 1927)
“A doctor, like anyone else who has to deal with human beings, each of them unique, cannot be a scientist; he is either, like the surgeon, a craftsman, or, like the physician and the psychologist, an artist.... This means that in order to be a good doctor a man must also have a good character, that is to say, whatever weaknesses and foibles he may have, he must love his fellow human beings in the concrete and desire their good before his own.”
—W.H. (Wystan Hugh)
“Delicious essence! how refreshing art thou to nature! how strongly are all its powers and all its weaknesses on thy side! how sweetly dost thou mix with the blood, and help it through the most difficult and tortuous passages to the heart!”
—Laurence Sterne (1713–1768)