Blog
Notes on email authentication
Practical articles on DMARC, SPF, DKIM, MTA-STS and email deliverability from the DMARCHub Team.
Deliverability · 18 September 2026 · 5 min read
Does DMARC improve deliverability?
DMARC is often sold as a deliverability fix. The truth is more nuanced: authentication is now a prerequisite for reaching major mailbox providers, but it will not rescue mail with poor content or a stale list. Here is what DMARC genuinely does for inbox placement, and what it cannot do.