About List Imports
To work with a list of customers generated by a source outside CRMS, you must import the list into CRMS. Importing a target list (that is, uploading a customer list file from your desktop) is one method of creating a CRMS Target List. Importing a list file (typically a list that was created outside CRMS) makes that list available for use within CRMS.
How CRMS Processes an Imported List
When you import a new target list, CRMS performs standard tests to ensure the quality of the data and that it meets the rules established in your settings. During an import, CRMS also checks for matches between imported email addresses and existing email addresses within your current Reward customer database. If a match is found, the complete existing record is used, which might make additional customer data available. Existing data is not changed.