What is an email warm-up service and why do I need one?
An email warm-up service gradually builds your sending domain's reputation by sending and engaging with real emails before you launch cold outreach sequences. Without it, cold outreach to 500+ prospects per month lands in spam, killing reply rates and pipeline. OnyxSend automates warm-up alongside your sequences so your domain stays healthy, your emails reach inboxes, and your qualified meeting bookings stay predictable month over month.
Evidence and detail
- New domains sent cold without warm-up see inbox placement rates below 40%, gutting reply rates on even well-researched prospect lists.
- Warmed domains with consistent engagement signals maintain deliverability above 90%, directly increasing the pipeline generated per sequence.
- Teams running multi-channel outreach to 1,000+ prospects monthly see 2-3x more booked meetings when warm-up is active versus skipping it.
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