📧 Cold Email Subject Line Scorer & Spam Detector
Calculates open-rate probability, evaluates mobile character display, and scans for spam filter trigger words.
OPEN_SCORE
88 / 100
CHAR_COUNT
45 chars
SPAM_RISK
0 DETECTED
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❓ Frequently Asked Questions (FAQ)
What is the optimal email subject line length?
Between 35 and 45 characters. This guarantees the entire subject line displays on mobile iPhone and Android mail apps.
What causes emails to land in spam?
Trigger words (FREE, GUARANTEED, $$$), ALL CAPS, excessive punctuation, and poor sender domain reputation.