show communication protocol from shop

# Conflicts:
#	views/twig/admin/mailConfigCheck.html.twig

Application/Controller/Admin/MailConfigCheck.php

@@ -33,6 +33,7 @@ class MailConfigCheck extends AdminDetailsController
     {
         $this->checkDataAreSet();
         $this->addTplParam('shop', Registry::getConfig()->getActiveShop());
+        $this->addTplParam('recipient', $this->testMailAddress);
 
         return parent::render();
     }
@@ -74,13 +75,31 @@ class MailConfigCheck extends AdminDetailsController
     {
         try {
 			$shop = Registry::getConfig()->getActiveShop();
+            $config = Registry::getConfig();
 			
             $mail = oxNew(Email::class);
-            $mail->setRecipient($this->testMailAddress);
+            $mail->setRecipient(
+                trim(Registry::getRequest()->getRequestEscapedParameter('recipient')) ?: $this->testMailAddress
+            );
             $mail->setBody('.');
 			$mail->setFrom($shop->getFieldData('oxowneremail'));
+
+            $currentDebug = $config->getConfigParam('iDebug');
+            $config->setConfigParam('iDebug', 6);
+            $mail->setSmtp();
+
+            ob_start();
             $mail->send();
+            $communication = ob_get_contents();
+            ob_end_clean();
+
+            $re = '/(^|\<br\>)(\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}\s)/m';
+            $subst = "$1";
+            $communication = preg_replace($re, $subst, $communication);
+
+            $config->setConfigParam('iDebug', $currentDebug);
             $this->addTplParam('mailer', $mail->getMailer());
+            $this->addTplParam('communication', $communication);
         } catch (Exception $e) {
             Registry::getUtilsView()->addErrorToDisplay($e);
         }