Apex Coding on Email Lead .....

public class EmailNotifyLead
{
 public static void SendEmail(Lead[] lead)
 {
  for (Lead l:lead)
 
  {
      //Date obj = Date.today();
      //Integer n = DAY(TODAY());
       DateTime t = l.CreatedDate;
       String[] toAddresses = new String[] {l.Email};
      //DateTime t = DateTime.now();
      t = t.addDays(10);
    if (t != null)
    {  
        Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
        mail.setToAddresses(toAddresses);
        mail.setReplyTo('sampath_thylak@yahoo.co.in');
        mail.setSenderDisplayName('ThylakSOft');
        mail.setSubject('Test Email From Force.com Sites');
        mail.setPlainTextBody('Test');
       
    }
 
   
   
  }
 }
}