File to IDoc Scenario exception handling

I have configured Time bound File to IDoc scenario with processing mode in Sender adapter as 'Delete'. And it is running perfectly. I am trying to add additional functionality to the scenario, i.e.,if a file does not exist on the ftp server, a mail should be sent to a recipient.

May be using Java proxy is not appropriate, as poll interval does not be accounted in Java Proxy and file server should be having Java runtime.

Please can any one suggest, how this can be acheived?

Regards,

Suraj Kumar