Email domain warming is a crucial process of gradually scaling up the volume of emails sent from a new domain or IP address to establish a positive sender reputation with ISPs and inbox providers. This is vital to ensure email deliverability to the inbox rather than being flagged as spam. To warm up your domain effectively in 2025, follow these key steps:

1. Set up correct technical email authentication: Ensure SPF, DKIM, and DMARC records are properly configured to authenticate your emails.
2. Begin with highly engaged subscribers: Create a segment of recipients who have recently interacted with your emails to kick off the warming process.
3. Start with a low sending volume: Initiate with a small number of emails (e.g., 50-100) on the first day and gradually increase this volume each day.
4. Craft engaging email content: Design emails that encourage interaction, offer value, and include clear CTAs to boost engagement signals.
5. Monitor performance closely: Keep track of metrics like open rates, click rates, bounce rates, and spam complaints, making adjustments as needed to maintain a positive sender reputation.

This process typically spans a few weeks to a month, depending on your daily sending goals. Patience and adherence to best practices are key to successfully warming up your email domain and enhancing deliverability.