This page allows you to upload a comma delimitted list of addresses into the mailing list. Note you can
generate a file of this type in Excel by choosing "Save As" with the file type of "CSV".
A CSV file has one line for each record, and the first line contains the field names. Each name or value is separated by commas and optionally surrounded by quotes. You can specify what type of record each line will create by adding a column called "Type". If none is specified, then the default one set on this page will be used.
Also, you can include a column called "parentid" which is the relative path from the page you are importing into. In other words, you can create folders within folders this way.