Free deliverability tool
Cold Email Subject Line Generator
Plug in a prospect's first name, company and topic. Get 20+ subject lines using patterns that consistently outperform in real cold outbound.
Lowercase wins
Subject lines that look like they were typed quickly by a human (lowercase, no punctuation) consistently outperform Title Case "marketing" subjects on cold outbound.
What makes a cold email subject line work
- Under 50 characters, most inboxes truncate beyond that on mobile.
- Lowercase, looks personal, not marketing.
- One concrete signal, a name, a company, a specific topic. Generic curiosity ("can I ask?") is dead.
- No punctuation pile-up, exclamation marks and emojis correlate with spam folder placement on B2B.
How to use these
Pick 2–3 that match the persona, drop them into an A/B test, and rotate. Subject line is the single biggest lever on open rate, but inbox placement comes first. Audit your SPF and DMARC before optimising copy.
Ship cold email that actually lands
Icemail bundles dedicated infrastructure, warmup, enrichment, and a unified inbox so your deliverability stays green.
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