Problem when sending email using spring MVC framework . It sends 2  emails to each customer.It shoud send only one.

// My controller where i am invoking email sending operation.
 
public class CustomerDetailsController extends MultiActionController {
    private MailSender mailSender;
   
    private SimpleMailMessage templateMessage;
 
SimpleMailMessage msg = getTemplateMessage();
        for (int i = 0; i < custDetailList.size(); i++) {
 
            CustomerDetailDTO custDetail = (CustomerDetailDTO) custDetailList
                    .get(i);
            String email1 = custDetail.getEmailFirst();
            String email2 = custDetail.getEmailSecond();
             String[] email = new String[2];
            if (!StringUtils.isBlank(email1)) {
                email[0] = email1;
            }
            if (!StringUtils.isBlank(email2)) {
                email[1] = email2;
            }
            if (!StringUtils.isBlank(email[0]) & !StringUtils.isBlank(email[1])) {
                msg.setTo(email);
            } else {
                msg.setTo(email[0]);
            }
            // setting subject of mail.
            
            msg.setSubject("Wire Confirmation");
            StringBuilder messageBody = new StringBuilder();
            messageBody.append("Please see confirmations below : \n\n");
            msg.setText(messageBody.toString());
 
            try {
                getMailSender().send(msg);
            } catch (MailException me) {
                logger.error("error in sending mail", me);
 
            }
}
}
 
    public MailSender getMailSender() {
        return mailSender;
    }
 
    
    public void setMailSender(MailSender _mailSender) {
        this.mailSender = _mailSender;
    }
 
    
    public SimpleMailMessage getTemplateMessage() {
        return templateMessage;
    }
 
  
    public void setTemplateMessage(SimpleMailMessage _templateMessage) {
        this.templateMessage = _templateMessage;
    }
}
 
// app-servlet.xml entries for this .
 
<bean id="customerDetailsController"
		class="com.fareis.afm.wire.controller.CustomerDetailsController">
		<property name="methodNameResolver">
			<ref bean="paramMethodNameResolver" />
		</property>
<property name="mailSender">
			<ref bean="mailSender" />
		</property>
		<property name="templateMessage">
			<ref bean="templateMessage" />
		</property>
</bean>
 
<bean id="mailSender"
		class="org.springframework.mail.javamail.JavaMailSenderImpl">
		<property name="host" value="myhost" />
	</bean>
 
	<!-- this is a template message that we can pre-load with default state -->
	<bean id="templateMessage"
		class="org.springframework.mail.SimpleMailMessage">
		<property name="from" value="shakil@domain.com" />
	<!-- 	<property name="subject" value="Your Request" /> -->
	</bean>