Unable to send Dunning Letter via email

Hi,

Can anyone tell me, what are the settings needed to enable the Email functionality for Dunning.

I checked the F150 Transaction but there's nothing on it that says...the Dunning Info can be emailed.

The requirement is, the Dunning output should be a SMARTFORM.

I checked the FM : PRINT_DUNNING_NOTICE_SF and it does have the functionality to email the document.

I dont know, how can this be triggered from F150.

Please help me out on this...

Thanks

Samarjit