How to maintain an errors in Outbound Interface

Hi,

I m Doing One Interface (Outbound From SAP) to Application Server?

whenever the File(TXT) in Created in Legacy Application Server with Succeesfull Record i have to Send an Email Notification to my Payroll

Adminisatrtor Of the legacy System.

Can any one Pls tell me the steps Howto DO this?

An also

If there is any error records found which tranferring Data to ths Legacy System.An Output shoul be display with error records.

How to maintain this in Interface Program.

Regards

Uday Kiran