It is the file that will contain the recipients for the campaign when Operation Mode is FULL or SEND:

• This file must be compliant with the formatting policies mentioned at the page http://help.mailup.com/display/mailupapi/CSV+File+Format
• You can use any kind of separator, but you must define it in the proper Settings.xml property (“Separator”).
• Make sure Recipients.csv was saved with UTF-8 encoding to avoid loss of special characters in some recipient names or content
• You can add up as many dynamic fields as your account allows.
• This file must comply with the formatting policies mentioned at the page http://help.mailup.com/display/mailupapi/CSV+File+Format .