Email & deliverabilityPractical guide · updated for 2026
How to Warm Up a New Email Domain Before Sending
Start with a handful of messages a day to people who will open and reply, then increase slowly over several weeks. Volume is not the first goal; a reputation that receivers trust is.
Have this ready
- An authenticated domain
- A small list of contacts who know you
- Access to bounce and complaint reporting
Step by step
- 1Finish SPF, DKIM and DMARC and confirm each one passes before sending anything.
- 2Send the first week to known contacts who will open and reply, not to a purchased list.
- 3Increase daily volume in small steps and watch bounce and complaint rates closely.
- 4Fix list quality first: remove hard bounces, invalid domains and role addresses.
- 5Keep one sending tool per domain at first so reputation is not split across providers.
- 6Check placement in a few real inboxes, including a corporate one, not just your own.
- 7Hold volume steady for a few days whenever complaints or bounces rise.
Want it done with you?
I can walk you through it in a Magic Box, show you the exact clicks, or do it with you and keep the recording. You log in yourself; I never see your password.
Common questions
How long does warm-up take?+
Weeks rather than days. Bounce and complaint rates decide whether you can increase, not a fixed calendar.
Should I warm up a new domain or send from an old one?+
An established domain with clean history starts stronger. A new domain gives you a clean reputation but no history.
Does a separate subdomain help?+
It separates marketing from transactional mail, so a campaign problem does not damage receipts and password resets.