What does this finding mean?
Sending systems cannot retrieve the announced policy.
MTA-STS result code
MTA-STS policy could not be fetched
mta.policy_fetch_failed
What is the next step?
Check DNS, HTTPS availability and the certificate of mta-sts.<domain>.
Please note: The result code describes a technical measurement, not a guarantee of delivery, security or legal compliance.
Content reviewed on 20.08.2026.