Mailing Through jar file in process studio

when i tried to send mail through runable jar. I am getting an error.below is the snapshot of it. and in eclipse i am perfectly able to send mail. please help me for this problem

Hi Pranjal,

Welcome to AutomationEdge!!

We have an question, do the jar require only mail_id as parameter?

Also, have an suggestion for you, we have Mail Step to send mail easily with or without attachment. You can try that way also.