Members of your group with Site Administrator privileges will be able to view all e-mails sent using the group e-mail system.

Select View All E-Mail from the Communications menu to see a page like the one shown below.

Click the View button to see the details of the e-mail, including a list of the recipients.

Click the Reply button to compose an e-mail to the sender and the recipients.

Click the Delete button to delete an e-mail that you have sent.  This will not retrieve the e-mail from the recipients, but it will remove it from the group database.