Dynamic Filename in Receiver mail adapter - is it possible without custom module or mail package?

Hello All,

We have implemented a file to receiver mail adapter scenario (PI 7.31) , the interface is a pass-through hence no ESR components involved.

Our requirement here is, the source file needs to be sent as mail attachment and attachment name should be dynamic i.e. target file name should be same as that of source file. 

I have searched in SCN blogs and found below solutions :

1. Using mail package ( We are not keen on implementing this as we don’t use any ESR components)
2. Michal blog for creating custom module : http://scn.sap.com/community/pi-and-soa-middleware/blog/2006/02/23/xi-dynamic-name-in-the-mail-attachment--pseudo-variable-substitution

      ( Not sure if this will work as I see there are many developers commented in the same link that they are facing issues even after implementing this solution)

So , we are just  looking if there are any other options apart from the above mentioned, in order to achieve the same. If anybody has achieved this through a different method, kindly let me know .

Thanks  in advance.