Burst report to a generic email, having dynamic subject and output file name

[nishant]

I have a requirement where I need to burst a report, and send the burst output to a generic email id. Moreover the subject line should have the burst key,also the generated excel file should be named like: reportname_Busrtkey.
To make the subject line and file name dynamic I have used event studio, and it's working fine.
But the problem that I'm facing is users want separate email for each burst key. The issue with  event studio is that if the email id is same for all burst outputs it attaches all the outputs in the same email.
So for example there are 10 providers, I'm getting 10 different emails with the busrtkey in the subject line, but every email contains all the 10 burst outputs also.
Is there any way where I can send 10 emails with bust key in the subject line and the output attached should have only the corresponding burst output.
The cognos version that I'm using is cognos 8.4