Unverified50% confidenceFactExact time

据估计全球超过30亿个邮箱受到Spamhaus数据库的保护

1

Sources

50%

Confidence

Medium-term (~90 days)

Relevance

8/19/2026

First Seen

Valid until: 11/17/2026

Sources

自托管邮件为何持续衰落？信誉机制与集中化困局解析

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