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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