[KongchangAI]
Verified65% confidenceFactExact time

SMTP协议在设计之初没有内建身份验证机制,导致邮件伪造至今仍相对容易,需要SPF、DKIM、DMARC等补充验证机制

3
Sources
65%
Confidence
Long-term
Relevance
8/9/2026
First Seen

Sources

Related Claims

Cite This Claim

Stable URI
https://kongchang.com/claim/720883
API
curl https://kongchang.com/api/v1/knowledge/claims/720883
MCP
get_claim(id=720883)