If you’ve sent a cold email in the last 12 months, you already know: the inbox is harder to reach than ever.

Google and Yahoo rolled out massive deliverability updates in early 2024. They effectively killed the "spray and pray" model. If you are sending thousands of generic, unpersonalized emails every day from a fresh domain, you aren’t just getting low reply rates—you’re getting blocked entirely.

In this guide, we’re going to cover exactly how email deliverability has changed, what you need to do to fix it, and how Coldreach’s AI SDR architecture is specifically designed to keep your domain reputation pristine while still scaling your outbound pipeline.

The New Rules of Email Deliverability

1. Spam Rates Must Stay Below 0.3%

Google has explicitly stated that if your spam complaint rate hits 0.3% (3 out of every 1,000 emails), you will be penalized. If it stays there, your domain will be burned. The only way to prevent spam complaints is to send highly relevant emails to people who actually need what you are selling.

2. Authentication is Mandatory (SPF, DKIM, DMARC)

These aren't optional anymore. Without proper DNS records, your emails will bounce or land straight in the spam folder.

3. Volume Spikes are Suspicious

Sending 0 emails on Sunday and 1,000 on Monday triggers automated spam filters. Pacing your sending to look like normal human behavior is critical.

Why Traditional Tools Are Failing

Most traditional sequencer tools (Apollo, Instantly, etc.) were built for volume. The default behavior is to load up 5,000 contacts, attach a 4-step template, and blast them out.

Because the templates are generic, prospects mark them as spam. Because the volume is high, the 0.3% threshold is reached almost immediately. The domain burns.

How Coldreach Solves Deliverability Natively

At Coldreach, we built our AI SDR from the ground up to operate under these new rules. We don't just "send emails"—we engineer the entire process to protect your inbox placement.

• Intent-Driven Targeting (Zero Spam Complaints): Coldreach monitors over 97 million accounts for buying signals. We only reach out when a prospect shows intent.

• True 1-to-1 Personalization: Our AI doesn't use templates. It researches the prospect and writes a completely unique email based on their specific signal.

• Human-Like Pacing: Coldreach sends emails slowly throughout the day, mimicking the exact behavior of a human SDR.

• Automatic Infrastructure Setup: We handle the complex SPF, DKIM, and DMARC setups for you.

Conclusion

The era of volume-based cold email is over. The only way to reach the inbox today is through extreme relevance, proper technical setup, and human-like sending patterns.

Stop burning your domains with generic blasts. Try Coldreach today and let our AI SDR handle the research, the personalization, and the deliverability for you.