Deliverability1 min read
Email Domain Warmup: New Domain Reputation for Business Mail
Sending volume ramps, authentication checks, and mistakes that burn a fresh domain — for startups sending their first real campaigns.
Brand-new domains have no reputation. Mailbox providers watch early sending closely — sudden blasts to purchased lists destroy trust for months.
Warmup principles
- Start with transactional mail to engaged users
- Ramp volume gradually over 2–4 weeks
- Ensure SPF, DKIM, DMARC pass before any bulk send
- Monitor bounce rate — keep under 2%
- Never buy email lists
Want to see how your own domain is set up? Use the free SPF checker and DMARC checker: they run in your browser and store nothing.