email-marketing
What is Email Deliverability?
The ability of your emails to actually reach recipients' inboxes rather than being filtered into spam or blocked by mail servers.
In plain English
Deliverability is the foundation of effective email marketing — you can have the best email in the world, but if it goes to spam, it doesn't matter. Factors that affect deliverability include your sender reputation, domain authentication (SPF, DKIM, DMARC records), list hygiene, engagement rates, and content. Sending to unengaged lists or using spammy subject lines and copy trains inbox providers to distrust your emails, harming deliverability for every future campaign.