Each day, hundreds of emails battle for focus—so how do you ensure yours is the one opened?
Today, we’re pulling back the curtain on the science of high-converting subject lines, the key to growing a 7-figure cold email business, and the hidden pitfalls that make re-engagement emails more irritating than effective.
Whether you’re emailing, you should read this. Let’s get started.
Mastering Email Subject Lines for Higher Open Rates 📧 watch the full 6-min video here
Video published: February 26, 2025
Your email subject line is the first—and often only—chance to grab attention.
In How to Write High Converting Email Subject Lines (Full Training), Instantly shares data-backed strategies from over 10 million cold emails sent, revealing what actually works.
The formula? Keep subject lines short, avoid spammy words, and spark curiosity without misleading. A/B testing is key—doubling down on high-performing subject lines can 10x reply rates.
The best subject lines fall into four categories: outcome-driven (“Boost Your ROI Today”), pain-based (“Struggling with Low Sales?”), personalized (“Loved Your Podcast on AI”), and curiosity-driven (“Quick Question for You, John”).
If you’re not optimizing your subject lines, you’re losing potential leads.
Key Takeaways:
- đź“ť Shorter = better: Subject lines under 41 characters get higher open rates, especially on mobile.
- 🎯 Curiosity drives clicks: Engaging, mystery-driven subject lines boost open rates—but only if the email delivers on the promise.
- đź“Š Data wins every time: A/B testing subject lines help find winners faster and automatically prioritizes the best performers.
- 🚀 High-performing campaigns see 6.9% reply rates: That’s nearly 10x the industry average when subject lines are optimized correctly.
How I Built a 7-Figure Cold Email Business 🚀 watch the full 42-min video here
Video published: September 11, 2024
Cold email changed my life.
In I Make 7-Figures/Year From Cold Email Outreach, I break down how my agency lands massive clients like Amazon, Apple, and Goldman Sachs, sending over a million emails per month—all while staying ahead of constantly evolving email restrictions.
The key? Building strong email infrastructure, mastering deliverability, and using hyper-personalized outreach. With Google and Yahoo cracking down on cold emails, limits have dropped to just 20 emails per inbox per day—meaning if you’re not optimizing, you’re invisible.
Key Takeaways:
- đź“© Cold email is a numbers game: We get 1 positive reply per 1,000 emails, nearly 10x the industry standard.
- ⚙️ Deliverability is everything: We use 40+ domains and 100+ inboxes per client to ensure emails land in inboxes, not spam.
- 🔥 Hyper-personalization wins: Tools like Clay make emails feel like I researched you for 30 minutes—at scale.
- đź“Š Newsletters = a growth hack: I scaled The Nomad Cloud to 200K+ subscribers using targeted list-building tactics.
Why Re-Engagement Emails Fail (And Annoy Customers) đź“© read the full 600+-word article here
Article published: February 21, 2025
Marketers love to send re-engagement emails, but most customers? They don’t love receiving them.
In Camping Out in the Inbox: Why Re-Engagement Emails Pile Up, MediaPost highlights why these emails often fail—and how brands can do better.
The biggest mistake? Assuming every inactive subscriber wants to be “won back.” Many don’t need your product right now—or worse, they’re being targeted based on bad engagement metrics like open rates (which don’t actually measure intent).
Other common pitfalls? Sending emails at the wrong time (like before customers have had their morning coffee) and assuming every email is a masterpiece customers are dying to read.
The fix? Smarter segmentation, better timing, and recognizing that not every subscriber needs to be re-engaged.
Key Takeaways:
- 🚫 Not everyone wants to be “won back”: Many inactive subscribers simply don’t need your product right now—and pushing them only annoys them.
- 📊 Open rates ≠intent: Brands rely on flawed engagement metrics like opens, when they should focus on clicks, purchases, and real browsing behavior.
- ⏰ Timing matters: Sending a re-engagement email at 5:30 AM? Bad idea. Customers aren’t in the mood to buy before coffee.
- 🎯 Personalization is key: Instead of generic re-engagement emails, brands should analyze past purchase history and browsing intent to send timely, relevant offers.
My Last $.02
Most emails go into the void—unread, unheeded, or worse, flagged as spam.
But top-notch senders? They understand how to write subject lines that command attention, get into inboxes (not spam boxes) and turn cold email into genuine conversation.
You’re losing if you’re not optimizing. These secrets put you ahead—use them before others do.
Until next time, happy emailing!
Adam