Cold Email and Outreach
How to Warm Up an Email Account for Better Deliverability
Updated June 15, 2026
Quick answer: Go to Email → Warmup, select the account, and configure the warmup duration (30/60/90 days), starting volume (5–10 emails/day), target volume, and increase rate. Click Start Warmup. OutreachBox gradually raises your sending volume to build sender reputation and keep your emails out of spam.
Sending too much, too soon from a new account is the fastest way to land in spam. Warmup gradually ramps your volume so mailbox providers learn to trust you.
What email warmup does
Warmup slowly increases your daily sending to:
- Build sender reputation.
- Improve deliverability.
- Avoid spam filters.
- Establish trust with email providers.
How to start warmup
- Go to Email → Warmup.
- Select the account to warm up.
- Configure the settings:
- Duration — 30, 60, or 90 days.
- Starting volume — typically 5–10 emails/day.
- Target volume — your desired daily sending volume.
- Increase rate — how fast volume scales each day.
- Click Start Warmup.
How to monitor warmup
The warmup dashboard shows active and completed warmups, progress bars, and metrics:
| Metric | What it shows |
|---|---|
| Days elapsed / remaining | Position in the warmup timeline |
| Current volume | Emails sent today |
| Target volume | Goal at completion |
| Success rate | Delivery success |
Track daily volume, delivery rates, bounce rates, and spam scores as warmup progresses.
Best practices
- Start warmup before you plan to run campaigns — it takes weeks.
- Be patient and let the full warmup period run.
- Don't rush volume; gradual scaling is the whole point.
- Send to engaged contacts and follow good sending practices to reinforce reputation.
Frequently Asked Questions
How long does email warmup take?
Typically 30 to 90 days depending on your target volume and the increase rate. Longer warmups support higher sustained sending.Why is my deliverability still low during warmup?
Continue the warmup process, review your sending practices, and watch bounce rates and spam scores. Deliverability improves as reputation builds.Can I run campaigns while warming up?
It's best to let new accounts warm up before heavy campaign sending. Ramp campaign volume gradually as warmup completes.Related articles
Warm up early and slowly — sender reputation is earned over weeks, not days.
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