Is there a way to export or import mailing lists?
Yes. You can just drag and drop a list of names from a text file. e.g., open a word or text file document and tile it next to a personal address list that you are creating. Drag over the whole set of names (or select all), then drag the selection from the document into the members list field of a list. This can also be used to set up membership and subscribers in a conference.