Unverified50% confidenceFactExact time
Google 曾自动扫描 Gmail 邮件内容以投放广告，并于 2017 年宣布停止这一做法
1
Sources
50%
Confidence
Long-term
Relevance
8/22/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedGmail's plus alias feature (e.g., yourname+tag@gmail.com) has been recognized and blocked by many services.67% similarUnverifiedGoogle提供Postmaster Tools工具查看域名在Gmail系统中的送达数据，但仅在每日向Gmail发送数百封以上邮件时才显示有意义的数据65% similarUnverifiedGmail's dot-ignoring rule applies only to @gmail.com and @googlemail.com domains; Google Workspace administrators can determine their own address resolution policies for custom domains.64% similarUnverifiedGmail于2004年公测上线，以1GB存储空间和搜索功能作为差异化卖点63% similarUnverifiedGmail's many-to-one address normalization mapping is mathematically called a surjection, which fundamentally eliminates the possibility of distinguishing different users through address variants.62% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/788476API
curl https://kongchang.com/api/v1/knowledge/claims/788476MCP
get_claim(id=788476)