8,400+ Real Mailboxes
MailPilot's peer warmup network is built from real user inboxes — not synthetic accounts. Here's how it works and why it matters for your inbox placement.
What makes a warmup network good
Real mailboxes — not synthetic accounts
Every inbox in the MailPilot network belongs to a real user who opted in to the peer warmup program. Warmup emails are opened, replied to, and archived by accounts with genuine usage patterns — not bot-simulated behavior that ISP algorithms are trained to detect.
Diversity over size
A network of 100,000 low-quality inboxes produces weaker reputation signals than 8,400 actively engaged ones. MailPilot deliberately balances Gmail, Outlook, and independent mail server accounts to build reputation across all major ISP reputation models — not just one provider.
Human-like engagement patterns
Warmup emails are read at varied times, with varied response delays, from varied IP addresses. Open times, reply lengths, and engagement ratios are all set to mirror real human email behavior — not robotic patterns that trigger spam filter ML models.
ISP-type balance
Your real cold email audience is distributed across Gmail, Outlook, and other providers. MailPilot's warmup network mirrors this distribution, so the reputation signals your domain builds transfer directly to real-world sending performance — not just a single-provider score.
Competitors who claim 100,000+ network accounts are often counting inactive or semi-engaged accounts. What matters is the ratio of active, engaging accounts per sending domain being warmed — and the diversity of ISP types represented. MailPilot's 8,400+ actively engaged accounts outperform larger but less active networks in producing genuine reputation signals.