Email deliverability
Definition
Deliverability is whether sent email reaches the inbox rather than the spam folder or a block. It is governed by sender authentication, domain reputation and recipient engagement rather than content alone.
The foundations are technical: SPF, DKIM and DMARC records correctly configured for every sending domain. Without them, major providers increasingly reject mail outright regardless of what it contains.
Beyond authentication, reputation is driven by engagement. Continuing to send to contacts who never open trains providers to treat the sender as unwanted, which suppresses delivery even to engaged subscribers. A sunset policy that stops mailing the disengaged usually improves reach within weeks.
Definitions are free.So is the audit.
Thirty minutes on a call, then a written 5-page plan inside 72 hours showing where this actually applies in your funnel — and what it is worth fixing first.