Splitting a List

Owned by Former user (Deleted)
Last updated: Apr 26, 2016

Segmenting a list into two or more parts can be a useful way to discover which version of your email receives the highest click-through rate or highest unique open rate. 

To split a list, you'll use the Dynamic List interface.  You'll have the options to simply split a list into multiple parts or split a dynamically generated list into multiple static lists.

Split a List into 2 Parts

  1. Open the Subscribers & Lists folder and click Lists
  2. Click the Add List button at the top of the grid and then select the type Dynamic
  3. Select the list you want to split
  4. You don't need to define any rules 
  5. Click Save Rules
  6. Click Create Static List in the bottom right corner
  7. Enter a name for the lists ("Part 1/2" and "Part 2/2" will automatically be added to this name for each list)
  8. Select yes, into 2 parts from the Split List drop down menu


  9. If you would like to randomize how the lists are split, select Randomize from the drop down menu
  10. Click Create New Static List
  11. The lists are now saved in the Lists folder

Split a List of Dynamically Generated Subscribers

  1. Open the Subscribers & Lists folder and click Lists
  2. Click the Add List button and then select the type Dynamic
  3. Select the lists you want to use as a basis for your dynamic list  
  4. Create rules to filter these lists
    1. Click the  icon to add another rule or the  icon to delete the rule
    2. Select a custom field or subscriber interaction, such as they opened an email in the last 30 days, from the first drop down menu
    3. Fill out the other rule options
  5. Click Save Rules
  6. To view the approximate list count from the specified rules, click Save and Show List Count
  7. Click Create Static List in the bottom right corner
  8. Enter a name for the lists ("Part 1/2" and "Part 2/2" will automatically be added to this name for each list)
  9. Select yes, into 2 parts from the Split List drop down menu


  10. If you would like to randomize how the lists are split, select Randomize from the drop down menu
  11. Click Create New Static List
  12. The lists are now saved in the Lists folder

NOTE: These split lists are static, so they won't automatically update in the future like a dynamic list. 


If you would like to learn more about dynamic lists, please read: Create a Dynamic List