We Sent 10,000 Emails Using SenderAI – Here’s What Happened
We tested 10,000 cold emails with SenderAI. Here's what worked, what failed, and what you need to know before your next campaign.
📊 What Happened When We Sent 10,000 Cold Emails with AI
Curious what really happens when you send 10,000 cold emails using AI-powered infrastructure? So were we. 😅
Cold emailing at scale can be risky: deliverability drops, responses dry up, and your domain reputation can tank overnight. But with smart setup and the right tools, it can also be incredibly effective.
So, we ran a real-world test — using SenderAI, the built-in AI feature in SenderWiz that instantly sets up SMTP servers, manages IPs, and optimizes delivery.
Here's what happened — and what you can learn from our 10,000-email experiment. 📊
🧪 Why We Ran This Test
Scaling cold outreach often means hitting technical roadblocks:
Deliverability issues
Throttling from providers
Spam complaints
IP/domain blacklisting
SenderAI claimed to simplify all of that — and we wanted to find out if it lives up to the hype.
🛠️ The Setup: 10,000 Emails, Smart Rotation, and AI-Powered Delivery
We created a cold outreach campaign targeting B2B leads across multiple industries.
📦 Campaign structure:
10,000 total emails
5 subject line variations
3 content variations
4 sender identities (rotated)
Mix of CTAs (soft and direct)
⚙️ Technical setup via SenderAI:
3 clean IPs and dedicated domains
Auto-warmed with SenderWiz warmup
SPF, DKIM, and DMARC auto-configured
Rotation features activated
This setup was launched without manual intervention — all handled via SenderAI.
📈 The Results: What Surprised Us the Most
Inbox Rate
87%
Compared to ~60–70% in typical setups
Open Rate
54.6%
Boosted by subject line rotation and smart scheduling
Reply Rate
11.3%
Authentic copy + varied senders led to real conversations
Bounce Rate
2.1%
Pre-send list cleaning reduced delivery risks significantly
✅ What Worked (And You Should Copy)
1. Smart Rotation = Higher Deliverability
No two emails were exactly alike. That helped us:
Stay under spam radar
Appear human
Trigger curiosity with varied angles
2. Warmed-Up IPs = Better Inboxing
Cold IPs are email killers. SenderAI’s auto-warmup process gave us instant credibility.
3. Monitoring & Real-Time Alerts
SenderWiz alerted us when engagement dipped or when a domain showed early warning signs — allowing us to act fast.
⚠️ What Didn’t Work (And What We Learned)
1. Over-Personalization Slowed Us Down
We tried heavy personalization using company and role data. It looked great — but limited scalability.
💡 Lesson: Light personalization + rotation is the sweet spot.
2. Too Many Follow-Ups
After the 2nd follow-up, reply rates dropped drastically — sometimes even triggering spam flags.
💡 Lesson: Quality beats persistence.
🧠 Why SenderAI Made This Possible
Let’s be clear — we couldn’t have managed this manually.
Without SenderAI:
SMTP setup and domain configuration by hand
Weeks of warmup management
Complex spreadsheets to track rotation
With SenderAI:
Fully automated server setup
Domain/IP health monitoring
Easy sender/content/subject rotation
Real-time stats and alerts
Everything inside one platform: SenderWiz.
🔍 Final Thoughts
Sending 10,000 cold emails can be a disaster — or a massive success — depending on how you do it.
With the right infrastructure, rotation, and testing strategy, it's possible to scale without sacrificing deliverability or your sender reputation.
SenderAI didn’t just make it easier — it made it smarter.
If you’re planning to grow your cold outreach this year, having a reliable engine like this might be the difference between spam folder doom and inbox hero status. 💪
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