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security.txt Watch
Which sites publish security.txt, and when its contact or expiry date changed.
Free Watch for MSPs
MTA-STS Watch
Which domains publish an MTA-STS policy, and when it moves between enforce, testing, and none.
MTA-STS Watch reads its source, MTA-STS policy files published by each domain, weekly, and has confirmed 0 changes since Nov 6, 2026.
Source: MTA-STS policy files published by each domain (RFC 8461). Checked weekly.
Domains watched50,000The Tranco top 50,000
History startsNov 6, 2026Nothing older
On timeCoverage numbers arrive after 14 days.
Latest changes
JSONNo changes yet. The robot checks weekly.
Alerts by email come with paid Watches. This Watch's changes are free to read here and as JSON.
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Which domains publish an MTA-STS policy, and when it moves between enforce, testing, and none. It does not determine compliance, approval, or intent.