Hi,

 am trying to send the mass email to contacts.I am getting the error as  below.Am doing this in a DE org.

System.EmailException: SendEmail failed. First exception on row 0; first error: NO_MASS_MAIL_PERMISSION, Single email is not enabled for your organization or profile. Single email must be enabled for you to use this feature.

My coding as  below

 private final List<Id> contactids;
  public List<Contact> con;
  public testemail(ApexPages.StandardController controller)
  {
     con = [select Id from Contact limit 5];    
     contactids=new  List<Id>();     
     for(Integer i=0;i<con.size();i++)
     {    
      contactids.add(con[i].Id);       
     } 
  }

  public void SendEmail()
  {
      Messaging.MassEmailMessage mail = new Messaging.MassEmailMessage();
      mail.setTargetObjectIds(contactids);   
      mail.setTemplateId('00X90000000ZQgA');
      Messaging.sendEmail(new Messaging.MassEmailMessage[] { mail });
  } 

  Can anybody tell me how to enable single email/mass email?

  Thanks  for any help