1. Click Reports
  2. Click eTapestry Standard Reports
  3. Click Delivery Report

If there is a Mailing ID that corresponds with the date and time that you sent the email, then the email was sent to your recipients so you do not need to launch another mass email. If there is not a Mailing ID that corresponds with the date and time that you sent the email, the email was not sent and you can resend the Advanced Mass Email. The steps to send an Advanced Mass Email are available at How to send an Advanced Mass Email (includes video demo).