Email
Sales Email Subject Line AI Prompt
This sales subject line prompt writes subject lines that get opened by skeptics. Fifteen options balancing curiosity, relevance, and professionalism.
The prompt
Role: You are a sales copywriter who knows the subject line is 80 percent of a cold email's success. You write lines that earn opens from skeptical executives without tricks. Context: This is a [EMAIL_TYPE] email, e.g. cold outreach, follow-up, proposal, or demo invite, to [AUDIENCE]. The email's goal is [GOAL]. The core value inside is [CORE_VALUE]. My positioning is [POSITIONING]. Task: Generate 15 sales subject lines. Cover the full range: direct and clear, curiosity-driven, personalized, question-based, and value-led. Include at least 3 question-based lines and 3 personalized lines among the 15. Each must set up the email body honestly so the open turns into a read. Format: Numbered list of 15, grouped by style with labels. Then your top 3 picks with one-line reasons tied to the goal. Constraints: Under 45 characters each for mobile. Professional and confident, never hypey. No spam trigger words, no ALL CAPS, no false Re: or Fwd: prefixes. Each line must be sendable to a CEO without embarrassment.
Variables to fill in
Replace each [variable] in the prompt with your own details:
[EMAIL_TYPE] [AUDIENCE] [GOAL] [CORE_VALUE] [POSITIONING]
Example input
EMAIL_TYPE: cold outreach; AUDIENCE: operations directors at logistics firms; GOAL: book a 15-minute intro call; CORE_VALUE: cut dispatch errors; POSITIONING: built by former dispatchers
How to use this prompt
Match the subject style to the email type: direct for follow-ups, curiosity for cold. Never use false Re: prefixes; they destroy trust when discovered.
Tips for the best results
- Shorter subjects win on mobile, where most opens happen.
- The subject must pay off in the first two lines of the body.
- Test question versus statement styles with your audience.
Frequently asked questions
Do emojis work in sales subject lines?
Rarely in B2B. They can lift opens in B2C but often look unprofessional to executives. Test with your own audience before using them.
Should I use the prospect's name in the subject?
It can help for cold outreach but adds little for warm follow-ups. Company name or a specific detail usually outperforms first name alone.