If you’re sending cold emails — whether for lead generation, affiliate offers, or bulk outreach — your emails can land straight in spam if you don’t warm up your sending domain properly. This is where an email warmup service becomes essential.
Let’s break it down in simple terms.
What Is an Email Warmup Service?
An email warmup service helps build trust between your email server and receiving inboxes (like Gmail or Outlook). It does this by gradually increasing your sending volume and simulating real interactions (like opens, clicks, and replies) from trusted sources.
This creates a positive reputation for your sender IP and domain. So when you send a real cold email, it’s more likely to reach the inbox — not the junk folder.
Why Warming Up Matters
Cold emails from a brand-new domain or SMTP server without warmup can:
- Get flagged as spam
- Damage your domain reputation
- Get your IP blacklisted
With a proper email warmup service, you avoid these issues. The system warms up your server daily by sending real-looking emails across a trusted network, gradually building sender history and credibility.
Real-World Example (Visual)
Imagine launching a campaign from a brand-new domain:
🟥 Without Warmup
- Sent: 1,000 emails
- Inbox Rate: 3%
- Most emails go to spam
🟩 With Warmup (14 Days)
- Sent: 1,000 emails
- Inbox Rate: 78%
- Clean delivery, active engagement
This is the power of a proper email warmup service — especially if you use a bulletproof SMTP.
Who Should Use Email Warmup Services?
- Marketers doing cold outreach
- Agencies managing multiple clients
- Affiliate and CPA marketers
- Bulk email senders with high-risk offers
- Anyone using bulletproof SMTP servers
Warming up is not optional anymore — it’s necessary if you want to survive in 2024’s strict email filters.
Pro Tips for Warmup Success
✅ Start with low volumes (10–20/day)
✅ Increase slowly over 2–4 weeks
✅ Use real-looking content (no spammy words)
✅ Make sure the warmup service supports your SMTP type
✅ Combine warmup with proper domain setup (SPF, DKIM, DMARC)
Why Use Our Warmup with Bulletproof SMTP?
At SMTP Genius, we offer a 100% non-suspendable bulletproof SMTP server — and yes, it comes with a built-in email warmup service..
You don’t need to set up anything manually. Our system starts warming up the moment your account is live. That means you can focus on scaling your campaign, while we take care of your sender reputation.
Frequently Asked Questions
What is an email warmup service?
It’s a process of sending controlled emails over time to build trust with ISPs. It helps your emails avoid spam folders.
How long should I warm up my domain?
Ideally, 2 to 4 weeks. The more gradual the warmup, the better the results.
Can I warm up multiple accounts at once?
Yes, our email warmup service supports multi-account and multi-domain warmup automatically.
Does SMTP Genius offer email warmup?
Yes, all bulletproof SMTPs from SMTP Genius include automated warmup with no suspension risk.
What if I skip email warmup?
Your cold emails are more likely to go to spam, damage your domain, or get your IP blacklisted.
Still not sure how to start warming up your email domain? Contact us for expert setup.