Email Warmup Tool for Safer, Controlled Sending
Connect SMTP, authenticate your domain, warm up mailboxes and monitor sender reputation before increasing campaign volume.
Everything you need to prepare your email sending
This page uses the same Inbox Warmup product and dashboard; it is not a separate disconnected tool.
Connect any SMTP
Included in the Inbox Warmup workflow.
Included in Inbox WarmupVerify SPF, DKIM and DMARC
Included in the Inbox Warmup workflow.
Included in Inbox WarmupSet safe hourly volume
Included in the Inbox Warmup workflow.
Included in Inbox WarmupTrack domain and mailbox health
Included in the Inbox Warmup workflow.
Included in Inbox WarmupMove from warmup to campaign readiness
Included in the Inbox Warmup workflow.
Included in Inbox WarmupUse the 7-day demo before first renewal
Included in the Inbox Warmup workflow.
Included in Inbox WarmupBuilt into the same dashboard.
Start with a 7-day demo, verify your sending setup, and continue automatically on the monthly plan you selected unless you cancel beforehand.
Connect SMTP and add your sending domain.
Verify SPF, DKIM, DMARC, Return-Path, ownership and tracking records.
Use hourly and monthly limits to prevent over-sending beyond your plan.
Email warmup software for controlled sending
Use one dashboard to connect SMTP, verify authentication, begin gradual warmup and review sender-readiness signals.
Connect
Add a supported mailbox or SMTP configuration and test the connection before sending.
Authenticate
Review SPF, DKIM, DMARC and sender alignment for the domain used in the From address.
Control
Choose conservative hourly and daily limits and prevent sudden sending spikes.
Monitor
Review activity, errors, bounces and reputation indicators before increasing campaign volume.
Best practices and common mistakes
Use the product as one part of a responsible sending process. Technical warmup cannot compensate for poor lists, deceptive content or high complaint rates.
Build a reliable foundation
- Connect a supported mailbox or SMTP server.
- Verify SPF, DKIM and DMARC before increasing volume.
- Set hourly and daily limits that match your plan and sending history.
- Keep contact data permission-based, relevant and maintained.
- Pause and investigate repeated errors instead of forcing more volume.
Common mistakes
- Launching high-volume campaigns immediately from a new domain.
- Ignoring failed SPF, DKIM or DMARC checks.
- Using purchased, scraped or outdated contact lists.
- Assuming warmup guarantees inbox placement or replies.
- Running warmup without coordinating campaign sending limits.
Works with supported mailbox and SMTP configurations
Provider names describe compatibility only. Inbox Warmup is an independent service and is not affiliated with or endorsed by these providers.
Frequently asked questions
Can email warmup guarantee inbox placement?
No. Warmup can support gradual sending activity and infrastructure readiness, but mailbox providers make final filtering decisions. Results also depend on list quality, content, complaints, bounces and sender history.
Should SPF, DKIM and DMARC be configured first?
They should be reviewed as early as possible. Correct authentication helps receiving systems verify the sender and makes troubleshooting more reliable.
How quickly should sending volume increase?
There is no universal schedule. Increase gradually according to the age and history of the domain and mailbox, provider limits, engagement, bounces and complaints.
Can I use a custom SMTP server?
Yes when the server supports the required connection and sender settings. Test the host, port, security mode, credentials and sender permissions before starting.
What should I monitor during warmup?
Monitor authentication status, successful sends, connection errors, bounces, complaints, replies and sudden changes in volume or provider response.
What happens after the 7-day demo?
Choose Launch, Growth, or Professional and authorize the subscription to begin. The demo is free for 7 days with 100 credits; the selected plan is charged after day 7 and then renews monthly unless cancelled beforehand.
Prepare Your Mailbox Before You Increase Sending Volume
Start with a 7-day demo, connect your domain, verify DNS, and cancel before day 7 if you do not want the selected monthly plan to renew.