Robocopy command /ndl?show only changes in log+email

Dear All

I wrote a simple command with robocopy to mirror all information from server1 to server2

everything is working perfectly , also i add blat to send email notification but

when i am using /ndl in my command emails are not being sent.

when i remove /ndl email are being sent?

i am using /ndl to only display the new files or delete files  in the log.

in fact i would like the log to show only update files 

could anyone help

thanks