The "Centurion" System: 5,000 Emails Daily at Scale

Outsourcey had a simple but difficult problem: They had 9 aggressive sales (closers) but not enough leads to keep them busy.

They needed volume. Massive volume. They wanted to send 5,000 cold emails every single day to penetrate their total addressable market.

But every time they assessed their internal "bulk sending" efforts, they hit spam traps, got domains blacklisted, and saw deliverability tank.

Sending 5,000 emails a day requires military-grade infrastructure. You can't just blast from one or two domains.

We built what we call the "Centurion" setup: 100+ separate mailboxes distributed across 10+ distinct sending domains.

• Domain Rotation: Sending load is balanced. If one domain sees a dip in reputation, it's automatically paused.
• Unified Inbox: The 9 sales reps don't log into 100 Gmail accounts. All replies funnel into a single "Master Inbox".

With the infrastructure in place, we launched campaigns that defied industry averages. Here are the actual snapshots from our dashboard:

$261,000 in Opportunities generated with a 76% Open Rate.

Consistency at Scale

It wasn't a one-hit wonder. Across different campaigns, we maintained open rates well above 70%.

Campaign A: 80.3% Open Rate

Campaign B: 72.3% Open Rate

• 75%+ Average Open RateAchieved through rigorous 14-day warmup cycles and perfect DNS authentication.
• 200+ Replies / MonthConsistent lead flow keeping 9 sales reps fully booked.

Managing this scale isn't just about setup; it's about maintenance.