global class TXP_Emailservice implements Messaging.InboundEmailHandler {
    global String val {get;set;}

        @AuraEnabled
        global Static List<String>  getpklName(){
            List<Schema.SObjectType> gd = Schema.getGlobalDescribe().Values();
            List<SelectOption> options = new List<SelectOption>();
            List<String> myStr = new List<String>();
            for(Schema.SObjectType f : gd)
            {
                options.add(new SelectOption(f.getDescribe().getLabel(),f.getDescribe().getLabel()));
            }

            for(SelectOption so: options)
            {
                myStr.add(so.getValue());
            }

            return myStr;
        }
    }