List Size Over Time Report

What Is the List Size Over Time Report 

The List Size Over Time Report shows how subscriber data changes over time. The report shows activity over each reported period as follows:

• Added - Subscribers added for the report period
• Bounced - Subscribers who experienced a bounce for the first time during the report period
• Undeliverable - Subscribers whose email address was marked as Undeliverable during the report period
• Unsubscribed - Subscribers who opted out of the list during the report period
• Active - The number of subscribers in the list that were not in a status of Bounced, Undeliverable, or Unsubscribed at the end of the report period

Because the data shows first-time events for a status change, there can and will be overlap of data. More than one event or status can occur with a subscriber in the time period you define, so realize that the report is showing you the most recent status change that occurred in the time period you define. 

This report accurately shows how subscriber statuses change over time and how lists grow; however, because of the design of the report, you can't reconcile counts by adding or subtracting Added, Bounced, Undeliverable, and Unsubscribe counts to a previous Active total to match a newer Active total. 

This report functions better over longer periods of time, so use the report to measure list growth over periods of 1 month or longer. Shorter time spans may reflect inconsistent results due to the smaller time frame.

Note: A subscriber may rarely move in and out of Bounced and Held statuses. But sometimes full inbox causes a message to bounce but a later attempt to send is successful, or a held subscriber clicks a link in an old email which moves their status from Bounced to Active. When this happens, the Bounced and Held values for a time period can change over time.

Why Run the List Size Over Time Report 

 Run the List Growth Over Time Report to evaluate the performance of a list over time.

How to Run the List Size Over Time Report

 Use the following steps to run the report:

1. Click the Tracking tab in the navigation bar.
2. Click my reports.
3. Click Subscriber Reports.
4. Click List Size Over Time.
5. Complete the information in the Report Parameters section:

   Start Date	The first date for which information is included in the report.
   End Date	The last date for which information is included in the report.
   Date Range	This field is available only if you are using a report activity. Valid values include: Custom Date Range Provides fields to specify a static date range. These are the same fields that appear if you are not using a report activity to run the report. Start Date The earliest date for which to include information in the report. End Date The latest date for which to include information in the report. Previous Time Period Provides a field to select the time period over which to run the report. The period is relative to when the report runs.
   List	The list whose performance is analyzed by the report. You can only select lists that were sent to between the start date and end date.
   Time Zone	The time zone in which you wish the results of the report to appear
   Date Format	The format in which dates appear in the report

6. Complete the information in the Report Results Delivery section. If you choose to send as an email, separate multiple email addresses with a semi-colon, but note the field has a 100 character limit. 
7. Complete the information in the Result File Format section.
8. Complete the information in the Run the Report section.
9. Click Submit.