Our company is in the process in conceptualising and developing a brand promotion and mass email marking application. The application is being developed in Java and we are thinking of the scope of having Zimbra as the mailserver. We are already using Zimbra as our corporate mail server and thus we are interested in the scope of having it in mass email marketing. Our application will provide the scope of marketing email creation and the mass emails will be send out from the application itself using zimbra as the SMTP gateway. Now my question is: Is it possible for an external application to gather and present the mass email statistics (viz. percentage of read mails, unread mails, bounced mails, clicked mails on a per email campaign basis) to its users through a set of zimbra APIs ? I am having a system/mail admin role in our organization and thus any help/insights on this issue will go much far in proposing the right kind of approach to our dev team.