mta-sts-policy-file

Email authentication: SPF, DKIM, DMARC, BIMI and MTA-STS

MTA-STS max_age Recommended Value Seconds in 2026

Discover the recommended max_age value in seconds for MTA-STS, and how it affects email deliverability. Improve inbox placement with real-world guidance.

Email authentication: SPF, DKIM, DMARC, BIMI and MTA-STS

MTA-STS Policy File Format: Version, Mode, MX, max_age Example

Learn the MTA-STS policy file format with real examples of version, mode, MX, and max_age. Ensure secure email delivery and reduce bounce rates with.