The consensus on the best IP warmup strategy for weekly email sends on new IPs emphasizes a gradual and consistent approach. Experts and documentation agree on starting with a small volume of high-quality emails to the most engaged subscribers and gradually increasing the volume over several weeks. Closely monitoring deliverability metrics such as bounce rates, spam complaints, and sender reputation is crucial, allowing for adjustments as needed. Maintaining consistent traffic patterns, ensuring a clean email list, and avoiding sudden bursts of email are also key. Some advocate for a faster ramp-up by doubling volumes every few days, provided that diligent monitoring enables quick adjustments. Furthermore, considerations such as throttling sends based on SMTP layer and list composition, varying send days to distribute traffic, ensuring valuable content, and addressing potential conflicts between content rules and sending schedules are highlighted.