Eventually succeeded, but encountered and resolved errors in Agents OBIEE 11g:
Step1: Create a new gmail account.
Go to http://www.gmail.com/ and create a new user.
Step2: Login to Enterprise Manager by using the credentials.
http:// bi server >:<7001>/em
Go to Business IntelligenceàCore ApplicationàDeploymentàMail.
Use the SMTP Server, Port, Username and Password as mentioned below.
Step3: Click Apply and Activate Changes.
Step4: Click Restart to apply recent changes.
Step5: Schedule a report.