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Cold Email Subject Lines That Get Opened

February 14, 2026312 viewsBy RevCrest Team
## Top 5 Subject Line Formulas

### 1. The Specific Question (42% open rate)
"Quick question about [their specific thing]"

### 2. The Mutual Connection (38%)
"Your Google reviews caught my attention"

### 3. The Value Tease (35%)
"How [competitor] increased bookings 40%"

### 4. The Pattern Interrupt (33%)
"hey" or "weird question"

### 5. The Direct Ask (30%)
"15 minutes Thursday?"

## Golden Rules
1. Keep under 6 words
2. Lowercase wins
3. Never lie
4. A/B test everything
5. Tuesday-Thursday, 9-11 AM