Hi,

I wrote the following code for sending email notification to customer, contact and case owner (users in queue) when there is change in the case record.

the conditions are, sender address : contact email

                                   CC address       : Web email

                                   BCC address    : Case owner (users in queue)  and users in Case Team.

For sending email to contact and webmail, I wrote.

trigger caseUpdationMailNotification on Case (after update) {
    Set<Id> conIds = new Set<Id>();
    List<Messaging.SingleEmailMessage> mails = new List<Messaging.SingleEmailMessage>();
    for (Case c: trigger.new) {
        conIds.add(c.ContactId);
    }
    Map<Id, Contact> conMap = new Map<Id, Contact>([SELECT Id, Email FROM Contact WHERE Id In :conIds]);
       for (Case c : trigger.new) {
        Contact relatedCaseContact = conMap.get(c.ContactId);
        Messaging.SingleEmailMessage CaseNotificationmail = new Messaging.SingleEmailMessage();  
        CaseNotificationmail.setToAddresses(new List<String> { relatedCaseContact.Email });
        CaseNotificationmail.setReplyTo('case2email@y-1zk8ulh2xsm24t92q30hootymudvrh3i38tjl5mli2n9yuqfiq.k-w0fefmaj.k.apex.sandbox.salesforce.com');
        CaseNotificationmail.setSenderDisplayName('Salesforce Support');            
        string oldcomment = trigger.oldMap.get(c.id).Most_Recent_Case_Comment__c;
        string oldMsg = trigger.oldMap.get(c.id).Most_Recent_Email_Message__c;
        String oldStatus = trigger.oldMap.get(c.id).status;
        
        if (c.status != oldStatus) {
          CaseNotificationmail.setToAddresses(new List<String> { relatedCaseContact.Email });
          If(c.SuppliedEmail!=null)
          {
          CaseNotificationmail.setCcAddresses(new List<string>{c.SuppliedEmail});
          }
          CaseNotificationmail.setSubject(' Case Status updation : ' + 'Changed to ' + c.status + '. Case:' + c.CaseNumber);
          CaseNotificationmail.setPlainTextBody('Your case Status: ' + c.CaseNumber ); 
        }
       else if((c.Most_Recent_Case_Comment__c  != oldcomment)&&(oldcomment != null))
        {
         CaseNotificationmail.setToAddresses(new List<String> { relatedCaseContact.Email });
          If(c.SuppliedEmail!=null)
          {
          CaseNotificationmail.setCcAddresses(new List<string>{c.SuppliedEmail});
          }
         CaseNotificationmail.setSubject(' New Case comment is inserted '  + 'in Case:' + c.CaseNumber);
          CaseNotificationmail.setPlainTextBody('New Case comment is inserted . and the casecomment is " ' +c.Most_Recent_Case_Comment__c  + '" in Case Number:' + c.CaseNumber ); 
        }
        else if  ((c.Most_Recent_Email_Message__c != oldMsg)&&(oldMsg != null))
                {
           CaseNotificationemail.setToAddresses(new List<String> { relatedCaseContact.Email });
          If(c.SuppliedEmail!=null)
          {
          CaseNotificationmail.setCcAddresses(new List<string>{c.SuppliedEmail});
          }
         CaseNotificationmail.setSubject(' New Case email message is inserted '  + 'in Case:' + c.CaseNumber);
          CaseNotificationmail.setPlainTextBody('New Email message  is inserted . and the message is "' +c.Most_Recent_Email_Message__c + '" in Case Number:' + c.CaseNumber ); 
        }
        else {
         CaseNotificationmail.setToAddresses(new String[] {'test.salesforceemail2case@gmail.com'});
         CaseNotificationmail.setSubject(' Case is updated '  + 'in Case:' + c.CaseNumber);
         CaseNotificationmail.setPlainTextBody('Case is updated in Case Number:' + c.CaseNumber ); 
           }
       mails.add(CaseNotificationmail); 
    }
    Messaging.sendEmail(mails);
}

But I dont have idea , how to send to the mass mail to case owner,

Can any one help for this?

Thanks.,

Ambiga