How to Write Re Engagement Email Subject Lines That Work

Re engagement email subject lines are the subject lines used in emails targeting leads or customers who have stopped responding or interacting with your business. The goal is to prompt them to reengage by opening and replying to your email. These subject lines need to stand out in a crowded inbox and clearly communicate the benefit or reason to reconnect.

Why this comes up / what goes wrong

Small-business owners often face the problem of leads going cold after initial contact. For example, a local service provider might have many inquiries but few replies after the first email. Without a follow-up that grabs attention, these leads can be lost. Typical follow-ups with generic subject lines like "Checking in" or "Just following up" often fail to excite or motivate recipients. Additionally, inconsistent or delayed follow-up reduces chances of re engagement. This leads to lost revenue and wasted marketing effort. Business owners want subject lines that increase open rates and prompt a reply to revive stalled sales conversations.

Step-by-step

1. Identify your inactive leads or customers. Review your CRM or email list to find contacts who haven’t replied or engaged in 30 days or more.

1. Create a subject line that sparks curiosity or offers value. Use questions, personalization, or mention a benefit. Examples: "Still interested in [service]?" or "A special offer just for you, [Name]"

1. Keep it short and clear. Aim for 30-50 characters so the subject line fully displays on mobile devices.

1. Avoid spammy words or all caps. Words like "Free," "Urgent," or excessive punctuation can trigger spam filters and reduce open rates.

1. Test different subject lines. Use A/B testing to see which subject lines get higher open rates and replies.

1. Send the email promptly and set a follow-up sequence. Schedule up to five follow-up emails over two weeks, stopping the sequence immediately when the prospect replies.

1. Track open and reply rates. Adjust your subject lines and timing based on what works best.

1. Use personalization tokens. Include the recipient’s name or company in the subject line if possible to increase engagement.

For more on automating this outreach, see email automation and sequences.

Example (fictional figures)

A landscaping contractor in Charlotte, North Carolina, has 500 leads who went cold after initial contact. They want to send a re engagement email sequence with subject lines to boost responses.

• Average value of a closed deal: $2,500
• Expected conversion rate from re engagement emails: 10%
• Number of leads targeted: 500

Calculate expected deals won:

500 leads × 10% conversion rate = 50 deals won

Calculate additional revenue:

50 deals × $2,500 per deal = $125,000 additional revenue

The contractor writes subject lines like:

• "Still thinking about your lawn care?"
• "Special offer to refresh your yard, [Name]"
• "Can we help with your landscaping plans?"

They send a five-step follow-up sequence over two weeks, stopping when a lead replies.

Common mistakes

• Using vague subject lines: Avoid generic phrases like "Checking in." Instead, be specific about why you’re reaching out. Prevent by brainstorming clear, relevant subject lines.

• Ignoring personalization: Not including the recipient’s name or company misses an opportunity to connect. Prevent by using personalization tokens in your CRM.

• Sending too many follow-ups: More than five can annoy leads. Stop once they respond. Prevent by setting limits in your follow-up sequence.

• Delaying follow-up: Waiting too long after inactivity reduces chances of re engagement. Prevent by scheduling timely follow-ups.

• Not testing subject lines: Without A/B testing, you miss learning what works best. Prevent by running tests on different subject lines.

Plan your email outreach carefully and use tools for automation and tracking, like WhatsApp and SMS CRM.

Doing this in HelloGrowthCRM

HelloGrowthCRM offers a shared inbox called HelloMail, where replies to quotation emails or re engagement outreach are visible to the whole sales team, preventing missed responses. You can set up sequences and campaigns to automate a five-step follow-up over two weeks that runs on its own and immediately stops when a prospect replies. This helps maintain consistent, timely follow-up without manual effort. Learn more about these features at email automation and sequences.

Frequently asked questions

What makes a good re engagement email subject line? A good subject line is clear, concise, personalized, and creates curiosity or highlights value. It should communicate why the recipient should open the email now.

How often should I send re engagement emails? A sequence of up to five emails over two weeks is typical. Stop sending once the prospect replies to avoid annoyance.

Can I use SMS or WhatsApp for re engagement? Yes, combining email with SMS or WhatsApp increases chances of reaching your leads. HelloGrowthCRM supports sequences across these channels.

Should I offer discounts in re engagement emails? Offering a limited-time discount or special offer can be effective but should be used strategically to avoid devaluing your product.

How do I measure success of my re engagement emails? Track open rates, reply rates, and conversion rates from these emails. Use A/B testing to improve subject lines and messaging.

Key takeaways

• Re engagement email subject lines target inactive leads to prompt replies.
• Use clear, personalized, and curiosity-driven subject lines.
• Send a sequence of up to five emails over two weeks, stopping when replied.
• Avoid vague, spammy, or overused phrases.
• Test subject lines and track results to improve.
• Automate follow-up with HelloGrowthCRM’s sequences and shared inbox.

Re engagement email subject lines are a simple but powerful tool to recover lost leads and boost sales. Start crafting subject lines that speak directly to your prospects’ needs and automate your follow-up for best results.

Start on the Free Forever plan (200 leads, no credit card) to try HelloGrowthCRM’s email sequences and shared inbox features for your business today.