Unverified50% confidenceFactExact time
SMTP 协议诞生于 1982 年
1
Sources
50%
Confidence
Long-term
Relevance
8/23/2026
First Seen
Sources
Related Entities
Related Claims
Cite This Claim
Stable URI
https://kongchang.com/claim/789668API
curl https://kongchang.com/api/v1/knowledge/claims/789668MCP
get_claim(id=789668)