Hi,
Please do a GOOGLE using search operators: site:wiki.scn.sap.com cl_bsc
have a look here...
http://wiki.scn.sap.com/wiki/display/Snippets/Send+email+from+ABAP+with+class+CL_BCS
Put the program code code in a form and call for each customer.....
You can add typed parameters to the form .(e.g. address )
Regards .