How should I warm up IPs after acquiring a company with 300,000 contacts?

Warming up IPs after acquiring a company with a large contact list requires a gradual, strategic approach focusing on engaged users, careful monitoring, and strong list hygiene. Experts and documentation emphasize starting with a small volume of emails sent to the most engaged subscribers, gradually increasing volume over time while closely monitoring deliverability metrics like open rates, click-through rates, bounce rates, and spam complaints. List segmentation by engagement and recency is crucial, as is maintaining a consistent sending cadence. Proper email authentication (SPF, DKIM, DMARC) is essential for building trust with mailbox providers. Tools like Google Postmaster Tools, Microsoft SNDS, and JMRP should be used to actively monitor sender reputation. A phased rollout, careful consideration of how new subscribers might react, and rigorous list cleaning are vital to prevent triggering spam filters and maintain a healthy sender reputation.

When warming up IPs after acquiring a large contact list, experts recommend focusing on sending to engaged users first. Email marketers also state to gradually increase sending volume and maintain consistent sending habits while closely monitoring deliverability metrics like open rates, click-through rates, bounce rates, and complaint rates. They suggest also to prioritize proper email authentication (SPF, DKIM, DMARC) to build trust with mailbox providers and enhance deliverability. Segmenting the list by engagement and recency, and pausing or adjusting the warming schedule based on performance, is key. The consensus is that a careful and data-driven approach is crucial to avoid triggering spam filters and maintain a healthy sender reputation.

Experts advise a gradual and strategic approach to warming up IPs after acquiring a large contact list. Recommendations include starting with the current sending volume and gradually increasing it, while closely monitoring open and click rates to adjust the pace. Emphasis is placed on list hygiene, rigorously cleaning the list to remove invalid or inactive addresses. Experts also suggest a phased rollout, segmenting the list based on engagement and gradually introducing contacts to the mailing schedule. Consideration for how new subscribers might react, along with the potential for increased complaints and triggering 'unexpected volume' filters, is crucial for a successful IP warm-up.

Technical documentation emphasizes the importance of a gradual IP warming strategy when acquiring a large contact list. Starting with a small volume of emails to the most engaged users is crucial, followed by a slow, progressive increase over weeks or months. Close monitoring of deliverability metrics (spam complaints, IP reputation, domain reputation) and sender reputation using tools like Google Postmaster Tools, Microsoft SNDS, and JMRP is essential for detecting and addressing any issues. Email authentication and following best practices are fundamental. List segmentation based on engagement and proper IP warming schedules are vital for a positive sender reputation and deliverability.