The Filter Reads Line by Line
The spam filter grades your email live, line by line.
the score updates per keystroke, line-highlighted — the black-box spam filter that normally only reports back after a send tanks your reputation becomes a visible, real-time rule engine you can watch and out-write
What goes in, what comes out
Learner composes a marketing email in a live editor while a simulated spam and deliverability scorer highlights each line as they type, flagging trigger phrases, link density, subject-line risk, and missing authentication signals before a real bounce report ever would.
type or paste the email subject and body; toggle authentication status; watch the live score
a running deliverability score from 0-100 with every triggering line highlighted inline and a predicted inbox/spam/promotions placement
authentication-status toggle (SPF/DKIM/DMARC present or missing); audience-list health slider simulating sender reputation
free public spam-score checker tool, high search intent + Module 'The Cost of a Send' L3 lab
Concepts click when you open the machinery.
Three labs are already live and free — the same hands-on style this playground brings to its module.