To ensure your new subdomain builds a positive sender reputation with email providers, I recommend the following approach:
- Start with a low volume: Begin by sending 1,000 to 5,000 emails per day for the first 3 days.
- Gradually increase: Double the volume every few days while closely monitoring your metrics.
- Days 4 to 7: Increase to 10,000 – 15,000 emails/day.
- Week 2: Scale up to 25,000 – 50,000 emails/day.
- Focus on engagement: In the early stages, prioritize sending to your most active users.
Additionally, after moving to a new domain, it’s important to properly configure your SPF, DKIM, and DMARC records for improved email deliverability. Be sure to verify your sender domain in AWS. For guidance, you can follow this video tutorial: How to Set Up SPF, DKIM, and DMARC.
You can also check out this guide for more information: MailBluster Help – AWS Positive Sender Reputation.