DKIM: many mail servers still use non-random keys (CVE from 2008)
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16 years of CVE-2008-0166 - Debian OpenSSL Bug
https://16years.secvuln.info/
Many DKIM setups used cryptographic keys vulnerable to the 2008 Debian OpenSSL Bug (CVE-2008-0166) in 2024.
DKIM is not always secure, be aware of that.