How the Grader Works
Scoring Factors
+15 ptsLength 30–50 characters (ideal for inbox display)
+10 pts4–8 word count (proven engagement range)
+5–15 ptsPower words detected ("you", "how", "proven", etc.)
+8 ptsQuestion format (curiosity gap)
+8 ptsContains a number (specificity signal)
+10 ptsPersonalization token present (, etc.)
−8/wordSpam trigger words ("free", "act now", "click here", etc.)
−10 ptsToo short (under 20 chars)
−10 ptsToo long (over 60 chars)
−12 ptsALL CAPS abuse (spam signal)
Grade Scale
A85–100 pts→Predicted open rate 28–40%
B70–84 pts→Predicted open rate 22–28%
C55–69 pts→Predicted open rate 16–22%
D40–54 pts→Predicted open rate 10–16%
FUnder 40 pts→Predicted open rate Under 10%