It's the single best leading indicator of your next campaign's performance — the 7 hidden factors about your list that bounce rate and open rate only show you after the damage is done. Two of them, no other platform measures.
Your score appears right here in 30 seconds. No email required.
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What your ESP shows you
What InbXr actually sees
All 7 signals passing
Where your emails land with all 7 signals green
Apple fakes your opens. Microsoft rejects weak DMARC. Gmail scores your imports on day-one behavior your ESP can't read. None of it hits your dashboard — all of it hits your reply rate, six weeks late.
Sources: Apple Mail Privacy Protection (announced WWDC 2021, iOS 15+) · Microsoft Outlook.com Sender Requirements (effective May 5, 2025) · Gmail & Yahoo Bulk Sender Guidelines (effective February 1, 2024).
We read all 7 of your list's signals before you hit send. So the next rule change doesn't ambush a campaign you couldn't see coming.
Ghost Opens are fake reads created by Apple Mail Privacy Protection. Over 55% of US email users have it enabled. Your ESP counts them. We don't.
Upload your list to find out →Bounce rate tells you what broke last time. Signal Score tells you what will break next time. Built on 7 inbox signals including MPP-adjusted real engagement and acquisition cohort quality. Two dimensions no other platform measures.
Get my Signal Score → Or read the full breakdown of all 7 signals →"My open rates dropped 40% and nothing changed."
Your open rate was already wrong before it dropped. Apple MPP inflated it for years. When real engagement fell, the gap between the number and reality finally became impossible to ignore. Signal 02 would have flagged it 30 days earlier.
"I verified my list, authenticated my domain, and still got flagged."
You were clean on Signals 01 and 06. The other 5 were broadcasting problems your stack was not built to hear. Acquisition Quality and Spam Trap Exposure were the ones that got you.
"I inherited a 200k list with no history attached."
Upload it as a CSV. Get a full 7 Signal reading in 60 seconds. Most inherited lists fail 3 signals before the first send. Now you will know which 3 before you touch them.
"I lost my sender score and it took months to recover."
Pre-send Check and Early Warning read the exact conditions that produce that event before you send, not after. Once is expensive. Twice is avoidable.
Every tool shares the same engine. Run them standalone for a quick answer, or let the Signal Engine read all 7 signals for the full picture.
All 7 inbox signals scored, tracked, and acted on. Free reading in 60 seconds.
6 auth protocols, 110 blocklists, A–F grade, and copy-paste DNS fix records.
One diagnostic. Top 3 reasons your emails are landing in spam, ranked and ready to fix.
Upload any list. We triage it: Remove, Re-engage, or Keep, with reason codes for every contact.
Spam score, copy grade, readability, originality & swipe-file risk, and AI rewrites. No sending required.
Send a real email and get the full deliverability report — plus Originality & Swipe Risk, the new check for reused template copy.
You have just learned what 5 of them are. The other 2 — Decay Velocity and Acquisition Quality — are where most senders catch the problem before it costs them a campaign.
Get your first 7 Signal reading in 60 seconds and see it before your next send.
Free · No credit card · First reading in 60 seconds