Simple Warmup helps you gradually build your domain's sending reputation by increasing email volume steadily over time, reducing the risk of being flagged as spam.
What Simple Warmup Does
Simple Warmup provides a straightforward way to warm up your domain by gradually increasing your sending volume based on your total contact count. Unlike Auto Warmup, which manages volumes separately for each email provider (Gmail, Yahoo, etc.), Simple Warmup uses one unified growth strategy that's easier to understand and predict.
When You Need Simple Warmup
Use Simple Warmup when:
You're sending from a brand new domain that hasn't established a sending reputation yet
Your domain hasn't sent emails in 30+ days
You want a predictable, easy-to-understand warmup schedule
You're running straightforward campaigns without complex provider-specific optimization needs
How Simple Warmup Works
Simple Warmup increases your sending volume using a phase-based growth schedule:
Days 1-10: +50% daily growth (aggressive initial ramp-up)
Days 11-20: +40% daily growth (moderate scaling)
Days 21-40: +30% daily growth (steady expansion)
Days 40+: +20% daily growth (conservative final phase)
For example, if you start by sending to 100 contacts on Day 1, you'll send to 150 on Day 2, 225 on Day 3, and so on, following the growth rate for each phase.
How to Set Up Simple Warmup
Create a new newsletter campaign and select your recipients
Navigate to the Schedule page
Select "Simple Warmup Mode" as your scheduling option
Choose your timezone and preferred start date/time
(Optional) If you've already warmed up your domain with another campaign, select "Start from advanced warmup day" and choose your starting day (1-50)
Review the warmup plan preview, which shows total days needed and estimated completion date
Click "View Detailed Warmup Plan" to see the day-by-day breakdown with growth visualization
Click Schedule to start your campaign
Your campaign will now send automatically following the warmup schedule.
Important Notes and Limitations
Starting from an Advanced Day:
If you've already established sending capacity with another campaign, you can skip the initial warmup phases by starting from an advanced day (anywhere from Day 1 to Day 50). This prevents you from restarting the warmup process unnecessarily.
Consistency Matters:
Don't skip days during the warmup process. Consistent sending is critical to building and maintaining your domain's reputation with email providers.
Monitor Your Metrics:
Keep a close eye on bounce rates and spam complaint rates during warmup. High rates may indicate list quality issues that need addressing.
Best Practices
Start from Day 1 if your domain is brand new or hasn't sent emails in over 30 days
Use the advanced start day option only if you've already warmed up with a previous campaign
Clean your contact list before starting warmup to minimize bounces and spam complaints
Follow Smart Sending recommendations when available, they'll suggest the optimal starting day based on your current sending capacity
Don't interrupt the warmup schedule once started, consistency is key to success
Simple Warmup vs Auto Warmup
Feature | Simple Warmup | Auto Warmup |
Growth Strategy | Contact-based (total volume) | Provider-specific volumes |
Complexity | Simple & predictable | Advanced & optimized |
Growth Rates | 50%/40%/30%/20% by phase | Provider-specific schedules |
Starting Day | Configurable (1-50) | Configurable (1-30) |
Best For | Simple campaigns, easier planning | Complex multi-provider optimization |
Choose Simple Warmup when you want straightforward, predictable warmup scheduling.
Choose Auto Warmup when you need advanced provider-specific volume management and optimization.
Common Questions
How long does Simple Warmup take?
The duration depends on your total contact list size and which day you start from. The warmup plan preview shows your estimated completion date before you schedule.
Can I use Simple Warmup for multiple campaigns at once?
Simple Warmup schedules each campaign independently based on your total contacts and selected growth schedule.
What if I've already sent some emails from this domain?
Use the "Start from advanced warmup day" option and select a day that matches your current sending capacity. Smart Sending can recommend the right starting point.
Do I need to do anything after scheduling?
No. Once scheduled, Simple Warmup handles the volume increases automatically. Just monitor your campaign metrics to ensure healthy sending patterns.