Deliverability Testing
A deliverability test sends a real email through your setup to a unique address SendLucid generates, then grades what arrives. The result is a 0–100 score backed by 25+ individual checks, each with a clear explanation and fix.
How to run a test
- Start a test — SendLucid gives you a one-time test address.
- Send an email to it the way you normally send (ideally a real campaign, from your ESP).
- SendLucid receives it, runs every check, and produces a scored report.
How the checks are organized
The checks fall into five weighted categories. The bigger the weight, the more it moves your score:
- Authentication — 35% — SPF, DKIM, DMARC, BIMI, reverse DNS, MX.
- Blacklists & Reputation — 25% — IP, domain, and body-link blacklists, domain age, sender reputation.
- Content & HTML — 20% — spam words, subject line, links, unsubscribe header, image/text balance.
- Infrastructure — 10% — TLS, HELO match, IP type, domain suffix.
- Best Practices — 10% — additional sending hygiene; this category is being expanded.
Reading your report
Every check tells you what it found, why it matters, and how to fix it. Work top-down: a single failed Authentication check usually costs more than several small content tweaks. For the concepts behind the numbers, see The Deliverability Score.