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A comment on Another free CA as an alternative to Let's Encrypt. Parent comment

Re:Another free CA as an alternative to Let's Encrypt by hackerbee on Monday November 23, 2020 @05:37PM (#25192789)
The patchwork of anti-phishing and anti-spamming measures like SPF and DKIM require DNS TXT records. Allowing mail from an IP address would likely be used almost exclusively for spamming.
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