We need to be able to auto populate from the Grading field by Potential Yield field. 
Platinum= 750+ 
Gold= 250k-750K 
Silver= 0k-250k 
 so I created a potential yield as number field and activated  3 workflow rules with field update Grading but its not working
 

Hi

 

   How to delete mass emails in Salesforce . I am using Developer Edition.

 

Regards

Jagjit Saini