Configure your email address and your account data for the SMTP server in the web interface of the Spybot S&D Update and Configuration Server. Logs of the scans on the clients will then be sent to the admin via email.

Furthermore when you plan to run Spybot S&D as a scheduled task, you need to configure it to use the SMTP protocol directly instead of the installed system default mailer. You can do this via the option Mailer application on the Client settings page of the Spybot S&D Update and Configuration Server.