: As of early 2025, Google, Yahoo, and Microsoft have enforced stricter authentication requirements for bulk senders to reduce spam. Importing Changes
Starting , Microsoft (Hotmail/Outlook) has joined Google (Gmail) and Yahoo in enforcing strict authentication rules for high-volume senders. yahoocom gmailcom hotmailcom txt 2025 link
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| Stakeholder | Risk Level | Explanation | |-------------|------------|-------------| | General users | Medium | If such a file exists, it enables account takeover, phishing, spam | | Email providers | Low (directly) | They cannot prevent external lists; rely on 2FA, login alerts | | Security researchers | Medium | Searching for such links may expose them to malicious files (malware, honeypots) | : As of early 2025, Google, Yahoo, and