While it is not possible to resend the same eNewsletter to new subscribers, it is possible to create a new mailing that is targeted at these new subscribers.

Create your mailing and when building your receiver base query, follow these steps:
  1. Expand the Communication folder and select eNewsletter Subscriber Lists and click Add
  2. Mark the radio button next to the eNewsletter subscriber base
  3. Then, select the Past Mailings criteria and click Add
  4. Mark the radio button next to the eNewsletter issue that you wish to "resend"
  5. Then, click the Not qualifier on Past Mailing item, so that you are filtering on people who did not receive the mailing
  6. Click the Preview button to see the list, if you like, then click Done