B2B Subject Lines That Get Opens

Why Subject Lines Matter

Your subject line is your first (and sometimes only) chance to make an impression. A good subject line:

• Stands out in crowded inboxes
• Sets expectations for the content
• Drives curiosity without being clickbait

Proven Formulas

The Question

• "Quick question about {{company}}'s outreach?"
• "Thoughts on {{industry}} trends?"

The Value Proposition

• "3 ways to improve your {{metric}}"
• "{{company}} + [Your Company]: potential fit?"

The Referral

• "{{referrer_name}} suggested I reach out"
• "Following up from {{event_name}}"

The Direct Approach

• "Meeting request: {{specific_topic}}"
• "{{first_name}}, quick call this week?"

Personalization in Subject Lines

Using variables in subject lines can boost open rates:

• Include the recipient's name or company
• Reference their industry or role
• Mention a recent achievement or news

Testing Your Subject Lines

With Outboxer:

1. Create multiple template versions
2. Test with smaller batches first
3. Track which versions perform better
4. Iterate and improve