After you upgrade from version 8.1, the value of the defualtSender option of the SMTP configuration is set to its default value (notifications@cognos.com) instead of the value before the upgrade. Therefore, BMC BladeLogic Decision Support for Server Automation cannot send notifications through SMTP relay.
Workaround:
notifications@cognos.com
string and replace it with the email address from which you want the notifications to be sent.