How to Warm Up a New Domain for Sending Campaigns

Warm-up fundamentals

Warming a domain means starting with low volume and increasing sends while maintaining strong engagement. Key steps:

• Start with transactional sends and internal users.
• Gradually increase volume by 10–30% every day depending on engagement.
• Monitor bounces, complaints and open rates; pause if metrics degrade.
• Use multiple sending IPs and stagger ramp for high-volume programs.

Document your warm-up and keep stakeholders informed — slow and steady wins the reputation race.