Unverified50% confidenceCautionExact time
When viewing Anthropic emails, the IP must be online and unchanged; switching IPs while viewing will result in an immediate flagging and ban due to the locator embedded in the email.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/21/2026
First Seen
Valid until: 12/20/2026
Sources
Related Entities
Related Claims
UnverifiedIP addresses of new mail servers often lack a sending history and can easily be flagged as suspicious sources by major email providers such as Gmail and Outlook.70% similarUnverified云服务商如AWS EC2或DigitalOcean分配的IP地址常带有历史滥用记录，从这些IP直接发送邮件往往遇到极高的拒收率67% similarUnverified配置优选IP时，若优选目标是IP地址则选择A记录，若是域名则选择CNAME记录67% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/938520API
curl https://kongchang.com/api/v1/knowledge/claims/938520MCP
get_claim(id=938520)