Email Deliverability
The ability to successfully deliver emails to subscribers' inboxes rather than spam folders, directly impacting campaign reach and ROI.
Definition
Email deliverability measures the rate at which emails reach intended inboxes versus being filtered to spam, blocked, or bounced. It depends on sender reputation, authentication protocols (SPF, DKIM, DMARC), list hygiene, content quality, and engagement metrics.
Why It Matters
Even the best email content is worthless if it never reaches the inbox. Poor deliverability means wasted effort and missed revenue. Maintaining high deliverability requires ongoing attention to technical setup and list management.
Examples in Practice
A sender with poor reputation sees 30% of emails landing in spam. Implementing DKIM authentication improves deliverability rates. Regular list cleaning removes inactive subscribers that hurt engagement metrics and reputation.