Here's how the Subscribers tab of the Email Service Properties dialog box looks like before any subscriber entries have been added:



And here's a part of the same dialog after adding two entries and selecting the first one:



Please notice how the Delete, Edit and Find buttons (partially visible), previously disabled, are now enabled because a subscriber's entry has been selected.

Use this tab to add, delete and edit entries of subscribers to this email service. Double-click on a subscriber entry you wish to edit or click on the entry to select it and click on the Edit button or press the SPACE key. If you do this, or if you click Add to create a new subscriber entry, the List Subscriber Properties dialog box will appear. To remove selected subscriber entries click Delete.

Click Find if you want to find a particular subscriber; the Find Subscriber dialog box will show up.

Right below the buttons I mentioned there are two more labeled Import and Export. You can use Import to import another subscribers from another email service or to exchange data with an external program using tab-delimited text files. Click Export to export subscribers to a tab-delimited text file.