Delete file after sending

For blat.exe <filename> , is there an option to automatically delete the file specified by <filename> after (successful) sending? Or can such an option be added?
 

 We're launching blat.exe as a process to send customized emails. Because it is launched as a process, and run time is undetermined, it's tricky to delete the file from the app that launched blat.exe
 

 Thank you.