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Notes on email authentication
Practical articles on DMARC, SPF, DKIM, MTA-STS and email deliverability from the DMARCHub Team.
Product updates · 18 September 2026 · 6 min read
What's new in DMARCHub v0.53: managed SPF, DNSSEC and guided MTA-STS
DMARCHub v0.53 is live. Managed SPF with flattening on selected plans, DNSSEC on the DNS Monitoring tab, up to three extra DMARC reporting addresses and a guided MTA-STS setup. Here is what each change does and what, if anything, it asks of you.