Is there any way to check email sent success acknowledgement in ksh | UNIX Shell Scripting

I need to send the generated CSV files on regular intervals using script. I and using UUENCODE and mailx for the same.

But i need to know that is there any method/way to know that email sent successfully? Any kind of acknowledgement or feedback or something???

It is likely to report for any error. Also the file is confidential and is not intended to deviate to some foreign path.