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CaptainDNS hosts your MTA-STS policy and BIMI logo, and monitors your DMARC and TLS-RPT reports automatically. All free, no server required.

Google, Yahoo and Microsoft now require stronger email authentication. Protect your deliverability in just a few clicks.

MTA-STS

MTA-STS guides and tutorials: secure email transport with mandatory TLS encryption.

9 articles

March 2026
February 2026