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:
“The Southerner is usually tolerant of those weaknesses that proceed from innocence.”
—Flannery O’Connor (1925–1964)
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“One of the baffling things about life is that the purposes of institutions may be ideal, while their administration, dependent upon the faults and weaknesses of human beings, may be bad.”
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