Rule Resolution in "Send Mail" - Step

[Vinod Ramchandani]

Hi,
 
I want to use "Rule Resolution Module" with "Send Mail" - Step.
But I am not able to see "Rule" - option in the list.
 
Why SAP has not find it necessory to have "Rule" - provision in "Send
Mail" - Step as we have in Activity - Step ?..?..?
 
Thanks,
Vinod Ramchandani.