Deliverability for new domains
Warm up your domain before your first real campaign
New domains land in spam because they have no sending history. WarmEnvelopes builds one for you — a few emails a day, growing steadily, to inboxes you own.
Emails per day, growing with your domain's reputation
How it works
Connect a domain
Add a domain you own and paste its Resend API key. Free accounts can warm up to 10 domains at once.
Add your inboxes
List your own email addresses as recipients. Warm-up mail only ever goes to inboxes you control.
We ramp the volume
A scheduler sends a few emails a day and gradually increases the volume, building a natural sending history.
Smart daily planning
Sending is spread across the day in small batches — no bursts that look like a script.
Real, human emails
A rotating library of 1,000+ natural-sounding messages in several languages keeps the traffic organic.
Full sending log
Every email is logged. Track progress per domain and filter the history by status and date.
Ready to earn your way into the inbox?
Sign in with Google, connect a domain, and let the warm-up run in the background.
Get started for free