To increase the likelihood that emails land in inboxes where recipients can engage with them, you need a consistent sending history and a good sending reputation. If a sender lacks these qualities, mailbox providers (MBPs) can slow down or block delivery of messages. Each time that you launch a new brand or start working with a new ESP, always schedule time to "warm up" your reputation by establishing a positive sending history.
Marketing Cloud Next starts with shared IPs for sending and email sends are automatically assigned dedicated IPs based on volume. Internal services continuously monitor shared and dedicated IP pools and rebalance traffic to ensure optimal delivery performance.
Before you begin warming your IP or sending domain, make sure that your domain meets email best practices enforced by major MBPs. Then, test that your emails follow DMARC, SPF, and DKIM through a service such as aboutmy.email.
We recommend sending to your most active and engaged subscribers during this critical period. MBPs use these initial sends to assess your sending reputation. The more opens and clicks your messages get, the quicker your sender reputation is established.
The process of warming an IP address or domain is contingent on its reputation with MBPs. Your reputation score is based on the number of opens, clicks, bounces, and complaints an IP address or domain receives. A higher reputation influences how quickly you can increase your send volume.
To improve your reputation, make sure that you have a clear double-opt-in process and follow good list data hygiene practices. Give recipients a say in the kinds of content that they receive and how often they receive them. Remove unengaged recipients from your mailing lists, and limit email sends to only those recipients who have engaged in the last six months.
High bounce rates, especially hard bounces, hint at a low-quality mailing list. A high complaint rate signals that your recipients don’t want your emails or think that the emails are spam. In general, aim to keep bounce rates under 2% and complaint rates under 0.1%.
To build a strong sender reputation, gradually expand your audience based on email interactions. For your first week, slowly increase your send volume. Send emails to only your most engaged recipients, including new sign-ups and anyone who’s engaged in the past month.
Increase your sending volume by 20% each day. After you reach a daily send volume of around 70% of your total audience, you can begin sending to your full audience. If you have millions of records, this could take time. If engagement rates drop or your sends are throttled or blocked during the warming period, pause sends at the current volume. Resume your warming plan once your metrics stabilize.
Here’s an example of how you can break down 30 days of high-volume email sending into a warming plan. However, every audience group is different, so remember to monitor engagement frequently.
|
Day |
Volume |
|---|---|
|
Day 1 |
100 |
|
Day 2 |
250 |
|
Day 3 |
400 |
|
Day 4 |
500 |
|
Day 5 |
600 |
|
Day 6 |
700 |
|
Day 7 |
850 |
|
Day 8 |
1,000 |
|
Day 9 |
1,200 |
|
Day 10 |
1,500 |
|
Day 11 |
1,750 |
|
Day 12 |
2,000 |
|
Day 13 |
2,500 |
|
Day 14 |
3,000 |
|
Day 15 |
3,600 |
|
Day 16 |
4,300 |
|
Day 17 |
5,200 |
|
Day 18 |
6,200 |
|
Day 19 |
7,500 |
|
Day 20 |
9,000 |
|
Day 21 |
11,000 |
|
Day 22 |
13,000 |
|
Day 23 |
16,000 |
|
Day 24 |
19,000 |
|
Day 25 |
22,500 |
|
Day 26 |
30,000 |
|
Day 27 |
35,000 |
|
Day 28 |
40,000 |
|
Day 29 |
50,000 |
|
Day 30 |
75,000 |
|
Day 31 |
100,000 |
|
Days 32+ |
Add no more than 30% additional volume daily until target send volume is reached |
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