Here this is my xml file of doing action,

            <record id="action_loan" model="ir.actions.act_window">

            <field name="name">Loan Request</field>

            <field name="res_model">loan.datas</field>

            <field name="view_type">form</field>

            <field name="view_mode">tree,form</field>

            <field name="domain">[('state','=','done'),('uname.user_id','=',uid)]</field>

            <field name="view_id" ref="loans_tree_view" />

         <menuitem action="action_loan" id="loan_detail" name="Loan Request" groups="base.group_user"

parent="loan_type" />

Now i want send mail ,if i click  "Loan Request" menuitem