When sending a large email deployment on shared IPs, should I send in batches?
Summary
What email marketers say8Marketer opinions
Email marketer from Mailchimp shares that segmenting large email lists and sending in batches can improve engagement and deliverability. By sending targeted content to smaller groups, you can monitor performance and adjust your strategy accordingly when sending a large deployment.
Email marketer from Reddit shares that when sending large volumes on shared IPs, they always throttle the email volume and monitor the bounce rate very closely.
Email marketer from Email Geeks recommends asking your ESP for confirmation, as it depends on how warmed up the shared IPs are. Sending might require batches depending on the circumstances.
Email marketer from SendGrid explains that warming up shared IPs involves gradually increasing sending volume. Start with small batches and monitor deliverability metrics to ensure a positive sending reputation when doing large deployments.
Email marketer from Email Marketing Forum states that batch sending gives more control for monitoring open and click rates, so adjustments can be made during deployment.
Email marketer from Quora suggests that gradual send outs and monitoring deliverability helps avoid deliverability problems when using shared IPs for high-volume sends.
Email marketer from StackExchange discusses that breaking the email lists into smaller sets can prevent you exceeding email limits and allow you to build a better sending reputation.
Email marketer from Mailjet explains that throttling email sends on shared IPs is essential to maintain a good sender reputation. If sending a large volume, gradually increase the sending rate to avoid being flagged as spam.
What the experts say4Expert opinions
Expert from Email Geeks shares that sending 6 million emails on shared IPs should be fine but recommends checking with the provider to be sure.
Expert from Word to the Wise answers questions about volume and IP reputation. She suggests that volume is a key factor when using shared IPs because email providers are looking for consistent sending patterns to ensure a good reputation. Sending in batches is important to maintain this consistency.
Expert from Word to the Wise explains that when using new or shared IPs, a gradual ramp-up is essential, increasing volume slowly and monitoring results to avoid deliverability issues. She highlights a real world experience where smaller batches sent initially helped avoid issues.
Expert from Email Geeks suggests talking to the ESP so they can load balance but suggests it is probably fine.
What the documentation says3Technical articles
Documentation from Google Postmaster Tools explains the importance of maintaining a good IP reputation. Sending in batches allows you to monitor your reputation and make adjustments as needed, minimizing the risk of being flagged as spam.
Documentation from Microsoft outlines email sending limits and best practices. Sending in batches can help adhere to these limits and prevent your emails from being blocked or throttled.
Documentation from RFC explains that SMTP servers may implement rate limiting to prevent abuse. Sending in batches can help avoid triggering these limits, especially on shared IPs where multiple users share the same sending infrastructure.