Fixes #95

Added try catch to $mailer->send() to catch any mailer specifc errors.

CHANGELOG.md

@@ -7,6 +7,7 @@ Changelog
 - Fixed a bug where single carriage returns in a `<textarea>` would be lost in the email. ([#118](https://github.com/craftcms/contact-form/issues/118))
 - Fixed a bug where HTML was not being properly escaped in an email body. ([#104](https://github.com/craftcms/contact-form/issues/104))
 - Fixed a bug where an empty file attachment field caused an error instead of sending an email without attachments. ([#116](https://github.com/craftcms/contact-form/pull/116))
+- Fixed a bug where sending fails silently. ([#95](https://github.com/craftcms/contact-form/issues/95))
 
 ## 2.1.1 - 2017-12-04
 

src/Mailer.php

@@ -9,6 +9,7 @@
 use craft\helpers\FileHelper;
 use craft\helpers\StringHelper;
 use craft\mail\Message;
+use Swift_TransportException;
 use yii\base\Component;
 use yii\base\InvalidConfigException;
 use yii\helpers\Html;
@@ -99,7 +100,13 @@ public function send(Submission $submission, bool $runValidation = true): bool
 
         foreach ($toEmails as $toEmail) {
             $message->setTo($toEmail);
-            $mailer->send($message);
+            try {
+                return $mailer->send($message);
+            } catch (Swift_TransportException $e) {
+                Craft::error('Error sending email: '.$e->getMessage());
+                Craft::$app->getErrorHandler()->logException($e);
+                return false;
+            }
         }
 
         // Fire an 'afterSend' event