Can I send emails to recipients in an external database?
Yes. you can send emails to recipients in an external database. To do this you will need the Pro or Enterprise versions of JungleMail. Both support BCS lists.
To achieve the sending you can configure a BCS list so that it connects to the external SQL Database. After you have done this you can use the BCS list as you would use any other list. Simply run JungleMail from the ribbon on the list and select your recipients.