Email Subject Line Guide
1. Keep it Under 50 Characters
Most email clients truncate subject lines beyond 50 chars on mobile. Stay concise.
โ
"Your invoice is ready" โ "Here is your monthly invoice summary for November 2024"
2. Create Curiosity or Urgency
Spark curiosity or add a time constraint to drive opens.
"Last chance: offer ends tonight" / "The mistake most teams make"
3. Personalize with {{"{{"}}First Name{{"}}"}}
Personalized subject lines increase open rates by 26% on average.
"Hey Sarah, your report is ready"
4. Use Numbers
Specific numbers build credibility and stand out.
"7 ways to improve your workflow" / "Save $340 this month"
5. Ask a Question
Questions engage readers and invite them to find the answer inside.
"Is your pricing strategy costing you clients?"
6. Avoid Spam Triggers
Words like FREE, URGENT, CLICK HERE and excessive caps/exclamation marks reduce deliverability.