Hello,
Which version of PI u are using?
In case of dual stack system, the best solution is to use ccBPM where u can request transport ack and once the message is sucessfully delievered on FTP server then then send a mail.
In case of PO, u can model ur scenario using NW BPM.
FoOr both the cases, there are blogs available on SDN so u can search the same.
Thanks
Amit Srivastava