Before launching campaigns, verify your email accounts meet essential warmup requirements. This ensures optimal deliverability and protects your sender reputation from the start.
Your account is ready when:
Warmup Duration: At least 2 weeks of active warmup
Health Score: Above 90%
Exception: Pre-warmed accounts are already ready and can send campaigns immediately.
Quick Check with Instantly Copilot
Type your question in Copilot chat: "Is my account warmed up and ready for campaigns?"
Copilot checks warmup duration and health score
Provides instant confirmation or guidance
Tells you exactly when the account will be ready
Note: When you use Copilot, each action consumes a small number of Instantly credits depending on the complexity of the task.
Warmup Duration
Each account should be warmed up for at least two weeks before sending campaign emails.
Builds sender reputation gradually
Establishes consistent sending pattern
Trains email provider algorithms
Reduces spam filter risk
Checking Warmup Duration
Go to your Email Accounts dashboard.
Click on the email account.
Open the Warmup tab.
Look for the "Started on (Date)" field:
Shows the exact date warmup was first enabled
Example: "Started on Mar 25, 2025"
Calculate duration:
Today's date minus start date
Example: Today Mar 25 - Started Mar 1 = 24 days
24 days = Ready (over 14 days)
You can also click the eyeball icon next to the flame for a quick view of your warmup timeline.
Warmup Health Score
The warmup health score measures the percentage of your warmup emails that landed in the inbox versus spam folders, based on the last 7 days of warmup activity.
Go to Email Accounts dashboard
Find "Health Score" column
Check score for your account
Aim for warmup health score above 90%
How to Improve Low Health Score
A low health score during the early stages of warmup is completely normal. As your accounts warm up, our system introduces new recipient accounts that haven't interacted with yours before, resulting in some warmup emails naturally landing in spam initially.
Our system automatically moves these emails from spam to the inbox, gradually building your sender reputation over time.
Verify DNS records:
Go to Email Accounts dashboard
Click "Test Domain Setup"
Ensure MX, SPF, DKIM, and DMARC are all configured
Fix any missing records
Confirm warmup is active:
Warmup is not paused
Warmup emails are actually sending
Use recommended warmup settings:
Increase per day: 1
Daily warmup limit: 10
Reply rate %: 30
Disable slow warmup: unchecked
Give it more time
Continue warmup for additional weeks
Health score improves over time
Reputation builds gradually
Why Is My Health Score at 0?
New accounts: If you just enabled warmup, accounts start sending warmup emails after 12 AM UTC the next day. Until warmup emails are sent, the score will remain at 0.
No recent activity: The health score only reflects the most recent 7-day period. If no warmup emails were sent in the last 7 days, the health score automatically resets to 0.