Recipients did not receive the mail in Rails 2.0.2

Hi,

I am new to ROR and i trying to send emails using rails version 2.0.2.
But the recipients did not receive the mail i check the log file also

parameters: {"commit"=>"Send Email",
"authenticity_token"=>"184d6f1d9095962085dcd800ce0581bda32f04ae",
"action"=>"send_mail", "controller"=>"emailer", "email"=>{"name"=>"xxx",
"body"=>"Test Mail sending using Rails ", "subject"=>"TestMail",
"address"=>"sss.k@stec.com"}}
Sent mail: