What is IP Warming and Why is it Important?
IP warming is the process of gradually sending emails from a new IP address to build a positive reputation with email service providers (ESPs). This progressive approach is essential to prevent emails from being blocked or marked as spam.
When an IP starts sending emails for the first time, it has no associated reputation. Providers such as Gmail, Yahoo, Outlook, and others evaluate the quality of the sending activity based on recipient interactions and key metrics such as delivery rate, bounce rate, and spam reports. A gradual warming process helps build credibility, improving email deliverability.
30-Day IP Warming Plan
Day | Number of Emails to Send | Notes |
|---|---|---|
1 | 500 | Send emails to the most active contacts to maximize engagement. |
2 | 750 | Check the delivery rate and initial bounces. |
3 | 1.000 | Monitor statistics for any anomalies. |
4 | 1.500 | Continue gradual sending while maintaining a good open rate. |
5 | 2.000 | Verify the first engagement signals (opens and clicks). |
6 | 2.500 | Analyze bounces and remove any invalid addresses. |
7 | 3.000 | Monitor any spam complaints. |
8 | 3.750 | Continue segmenting recipients based on engagement. |
9 | 4.500 | Ensure the delivery rate remains stable. |
10 | 5.500 | Gradually increase while maintaining a focus on quality. |
11 | 6.500 | Avoid sending to addresses with very low interactions. |
12 | 7.500 | Maintain a balance between new contacts and active recipients. |
13 | 9.000 | Check the distribution of bounce rates by provider. |
14 | 10.500 | Monitor trends in opens and clicks. |
15 | 12.000 | Continue excluding addresses with persistent bounces. |
16 | 14.000 | Ensure engagement remains positive. |
17 | 16.000 | Gradually add recipients with moderate interactions. |
18 | 18.500 | Ensure IP reputation remains stable. |
19 | 21.000 | Observe the trend of spam complaints. |
20 | 24.000 | Maintain a balance between volume and recipient quality. |
21 | 27.500 | Adjust the growth rate based on collected data if necessary. |
22 | 31.000 | Avoid sending to outdated or low-engagement lists. |
23 | 35.000 | Continue monitoring performance metrics. |
24 | 40.000 | Ensure opens and clicks do not drop too much. |
25 | 45.000 | Evaluate the impact of volume increase on delivery rates. |
26 | 50.000 | Maintain a steady flow without sudden increases. |
27 | 55.000 | Optimize recipient segments based on collected data. |
28 | 60.000 | Continue removing invalid addresses. |
29-30 | 65.000 | Keep constant monitoring on delivery metrics. |
Monitoring and Performance Analysis with MailUp
To ensure an effective IP warming process, it is essential to constantly analyze the metrics available in MailUp:
Delivery Rate (MailUp Statistics)
Measures the percentage of emails successfully delivered compared to those sent. A sudden drop may indicate IP reputation issues or blocks from email providers.Bounce Rate (What Are Bounces?)
Bounces occur when an email cannot be delivered to the recipient for various reasons, such as a non-existent address or a full mailbox. MailUp automatically manages bounced email addresses, removing invalid ones to maintain a clean and optimized list.
Abuse Report Rate (Abuse Reports)
Indicates the percentage of recipients who have marked the email as spam. A high increase in reports can harm the IP reputation and affect future email deliverability.
Recipient Engagement (Engagement Filters)
MailUp's engagement filters classify recipients based on their level of interaction with emails (Very Active, Active, New, Low Activity, Inactive). Using these filters helps segment lists and optimize sending during the early stages of warming up.
Segmenting Recipients Without Engagement History
If you need to send emails to recipients who have never been contacted through the platform and for whom no engagement data is available, you can use demographic filters (Demographic Filters) to segment the list based on data from previous sending platforms.
You can use these filters to divide recipients according to:
Subscription Date → To distinguish recent contacts from older ones.
Contact Source → To separate recipients acquired through forms, e-commerce, events, etc.
Last Recorded Interaction Elsewhere → If previous platforms provided data on opens or clicks, this information can be used to create targeted segments.
Segmenting recipients helps select the most reliable contacts during the initial phases of IP warming, reducing the risk of spam reports and deliverability issues.