Deliverability

Whether your messages reach the inbox instead of spam (email) or get delivered instead of filtered (SMS). The real constraint in outbound.

Deliverability is the practical ceiling on every outbound channel — the best message fails if it never reaches the recipient. For email it's governed by dedicated domains, warm-up, authentication (SPF/DKIM/DMARC), and list hygiene; for SMS, by A2P registration and sending behavior.

It's infrastructure, not copywriting. Treat it as table stakes you handle consistently, and the message quality finally gets to matter.

Related terms

SPF (Sender Policy Framework)DKIM (DomainKeys Identified Mail)DMARCDomain Warm-up

Put the terms to work.

BILT AI runs the outbound machine behind every one of these — offers, follow-up, and pipeline on autopilot.