Deliverability is whether your email actually reaches the inbox rather than the spam folder or a block, unlike delivery, which only means the receiving server accepted it.
Category
Deliverability
Also known as
email deliverability; inbox placement
It depends on authentication (SPF, DKIM, DMARC), sender reputation, list hygiene, and engagement. Poor deliverability can be invisible in campaign dashboards because the mail may count as delivered while quietly landing in spam.
In practice
Protect deliverability before you scale volume: authenticate every sending domain, remove unengaged addresses, and watch reputation. The best content earns nothing from an inbox it never reaches.
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