There should be an SMTP send retry functionality in case of connection or any other issue related to SMTP where Infoburst retries to send the mail when it has already tried but failed to. Currently, Infoburst tries to send the mail once and if there is any issue it fails. There should be SMTP send retry so that in case of small issues, the retry will ensure the delivery of the mails.
...also, a retry settings would be beneficial if the burst is aborted at the refresh time due to lost connection from the reporting database. We have a database that occasionally throws 'lost connection' error and would like to set several retries, just like BO has. In general, retry is a really necessary feature for scheduled bursts.