rolled back my clever map+join, because it broke the tests

lib/appenders/smtp.js

@@ -26,26 +26,26 @@ function smtpAppender(config, layout) {
 		
       var transport = mailer.createTransport(config.transport, config[config.transport]);
       var firstEvent = logEventBuffer[0];
-      var body = logEventBuffer.map(layout).join('\n');
+      var body = "";
+      while (logEventBuffer.length > 0) {
+        body += layout(logEventBuffer.shift()) + "\n";
+      }
+
       var msg = {
         to: config.recipients,
         subject: config.subject || subjectLayout(firstEvent),
         text: body,
         headers: { "Hostname": os.hostname() }
       };
-
       if (config.sender) {
         msg.from = config.sender;
       }
-
       transport.sendMail(msg, function(error, success) {
         if (error) {
           console.error("log4js.smtpAppender - Error happened", error);
         }
         transport.close();
       });
-
-      logEventBuffer = [];
     }
 	}