Suped

Summary

The belief that sending 70 million emails per month requires 70 dedicated IP addresses, based on a 1 million emails per IP per month rule, is largely a misconception within the email deliverability community. While this guideline might exist in some documentation, it typically doesn't reflect real-world sending capabilities for reputable senders.

What email marketers say

Email marketers often discuss the practicalities of managing high email volumes with dedicated IPs. Many find that common rules of thumb regarding IP allocation are overly cautious and don't align with actual deliverability performance, especially for senders with a good sending history. The consensus points towards reputation and sending practices as far more critical than simply the number of IPs.

Marketer view

Email marketer from Email Geeks states that sending 70 million emails per month (roughly 2 million daily) is absolutely within the capabilities of a single dedicated IP address. There is no need for 70 IPs to handle this volume, as long as sender reputation is solid.

04 Mar 2025 - Email Geeks

Marketer view

Email marketer from Email Geeks suggests that while one IP is sufficient for 70M/month, having two IPs might offer a bit more flexibility. However, the difference in deliverability or performance between one and two IPs for this volume would likely be negligible.

04 Mar 2025 - Email Geeks

What the experts say

Deliverability experts consistently emphasize that sender reputation, not merely the number of dedicated IPs, dictates high-volume email sending success. While dedicated IPs offer control, their effective utilization depends on meticulous list hygiene, content quality, and adherence to sending best practices. The capacity of a single well-managed IP vastly exceeds many common, conservative estimates.

Expert view

Expert from Spamresource asserts that a well-maintained dedicated IP, especially one with a long history of sending solicited mail, can easily handle millions of emails per day. The capacity is less about a fixed number and more about the quality of the mail stream and the recipient engagement.

04 Mar 2025 - Spamresource

Expert view

Expert from Word to the Wise explains that mailbox providers primarily trust sender reputation built over time. Adding many new IPs without a strong underlying domain reputation or proper warming protocols can actually hinder deliverability, as new IPs start with neutral or unknown trust.

04 Mar 2025 - Word to the Wise

What the documentation says

Official documentation from various email service providers (ESPs) and industry sources often provides guidelines on dedicated IP usage. While some sources might present conservative estimates or specific thresholds for eligibility, a deeper read often reveals that these are minimum recommendations, and actual sending capacity is heavily influenced by dynamic factors like sender reputation, engagement, and recipient feedback.

Technical article

Documentation from UniOne states that to send approximately 10 million emails per month, which equates to around 333,000 messages per day, you would typically need four dedicated IPs. This calculation is based on an internal capacity estimate of 85,000 emails per IP per day, suggesting a specific, lower threshold for IP utilization.

22 Apr 2025 - UniOne

Technical article

Documentation from Mailgun, in an article about dedicated IP usage, provides a guideline stating that ratios vary widely by need and use case, but a general average is 1 dedicated IP per 1 million emails per month. This indicates a common, albeit debated, industry benchmark.

22 Apr 2025 - Mailgun

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