A Simple Mail Transfer Protocol (SMTP) Server is needed to send LabTutor report document emails to students or to an administrator. Specifically, an SMTP Server controls outgoing email. LabTutor Server converts the experiment report page into a report document, which is then put in an email that is sent to the SMTP Server. The SMTP Server then controls the outgoing email, sending it to its destination.
The SMTP Server details are configured on the Server, Configuration tab of the LabTutor Server administration pages.