Sending mail through ESS Leave workflow

Hi experts ,

I need to send outlook mail through workflow .I am using 2-level approver ESS Leave workflow .

I am successfully able to send mail to 1st approver AGENT_001.AGENTS , but not to 2nd approver.

But I am choosing 2 approver through rule 00000168 .

There is no rule kind of thing in send mail step . Also if I send mail through a activity step and set it as background task , it does not allows me to choose agent through rule .

What can be an alternative to this ?

suitable points will be awarded.

Thanks, Yash