Unverified50% confidenceFactExact time
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
1
Sources
50%
Confidence
Long-term
Relevance
8/19/2026
First Seen
Sources
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