Unverified50% confidenceFactExact time
Email is built on open protocols such as SMTP, IMAP, and POP3, which do not belong to any single company.
1
Sources
50%
Confidence
Long-term
Relevance
9/30/2026
First Seen
Sources
Related Entities
Related Claims
Unverified电子邮件基于SMTP/IMAP的邮件系统不受任何单一公司控制，使创作者的订阅者列表成为真正属于自己的资产71% similarVerifiedThe SMTP protocol was designed without a built-in authentication mechanism, making email spoofing relatively easy to this day and requiring supplementary verification mechanisms such as SPF, DKIM, and DMARC71% similarUnverifiedSMTP协议存在致命缺陷：任何人都可以在邮件的发件人字段填写任意地址69% similarUnverifiedSMTP 协议在设计之初（RFC 821，1982年，由 Jon Postel 撰写）没有考虑身份验证问题，任何人都可以声称自己是任何发件人68% similar
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