What it means
Inbox providers score your sender reputation and decide whether to deliver, junk, or block. It rests on authentication (SPF, DKIM, DMARC), list hygiene, engagement rates, and avoiding spam triggers.
Why it matters
Teams obsess over subject lines while their domain reputation quietly collapses. Authenticate your domain, send to people who actually want it, remove hard bounces and dormant contacts, and warm up new sending domains. Deliverability is the invisible foundation under every open rate, click, and email-driven dirham.