[SalesForce] Error when using setOrgWideEmailAddressId in SingleEmailMessage [resolved]

Assuming you have this button on a related list/list view, you can use the {!GETRECORDIDS} javascript function to get the list/array of id of the selected records. You can then send this array to your apex class and then query the email field to get the email. YOu can do something like this:

{!REQUIRESCRIPT("/soap/ajax/28.0/connection.js")}
{!REQUIRESCRIPT("/soap/ajax/28.0/apex.js")}
var recordIdArray = {!GETRECORDIDS($ObjectType.Contact)};
console.log('the record Ids are' + recordIdArray);
var retStr = sforce.apex.execute("outbound_Emails", "SendEmailNotification",{conId: recordIdArray});

global class outbound_Emails{
        webservice static void SendEmailNotification (list<id> conId){
            list<contact> conList = [SELECT name,email FROM contact WHERE id IN : conId];
            system.debug('the selected contacts are  ' + conList);
            //you can iterate over this list to get the email and send the mail
        }
}

I see that the code where you find actual accounts is not returned in wrapper format

    public pagereference Search()
    {
        String finalSearchValue = '%' + fullname + '%';
        Accounts = [Select Id, Name, Active__c FROM Account
                    where Name like :finalSearchValue];
        wraplist = new list<wrapData>();  
        for(Account a: Accounts)
        {
            wrapList.add(new wrapData(a));
        }
       return null;
   }

Same way apply for filter method as well.