diff --git a/src/Service/LogService.php b/src/Service/LogService.php
index e919da7..02e4290 100644
--- a/src/Service/LogService.php
+++ b/src/Service/LogService.php
@@ -4,9 +4,9 @@
 
 namespace Dot\Mail\Service;
 
+use DateTimeImmutable;
 use Dot\Mail\Email;
 
-use function date;
 use function dirname;
 use function file_exists;
 use function file_put_contents;
@@ -56,7 +56,9 @@ public function sent(Email $message): false|int|null
             'cc'      => $this->extractAddresses($message->getCc()),
             'bcc'     => $this->extractAddresses($message->getBcc()),
         ];
-        $data = sprintf('[%s]: %s' . PHP_EOL, date('Y-m-d H:i:s'), json_encode($data));
+
+        $date = new DateTimeImmutable();
+        $data = sprintf('[%s]: %s' . PHP_EOL, $date->format('Y-m-d H:i:s'), json_encode($data));
 
         /**
          * Write the log data and return the result
diff --git a/src/Service/MailService.php b/src/Service/MailService.php
index e10a540..34e35ac 100644
--- a/src/Service/MailService.php
+++ b/src/Service/MailService.php
@@ -22,6 +22,7 @@
 use function array_merge;
 use function basename;
 use function count;
+use function fopen;
 use function is_file;
 use function is_string;
 
@@ -61,6 +62,7 @@ public function send(): ResultInterface
             //attach files before sending
             $this->attachFiles();
             $this->getTransport()->send($this->getMessage());
+            $this->getMessage()->setBody(null);
 
             $this->getEventManager()->triggerEvent($this->createMailEvent(MailEvent::EVENT_MAIL_POST_SEND, $result));
         } catch (Exception $e) {
@@ -102,7 +104,7 @@ public function attachFiles(): false|Email
                 continue;
             }
             $basename     = is_string($key) ? $key : basename($attachment);
-            $attachedFile = new DataPart($attachment, $basename, null);
+            $attachedFile = new DataPart(fopen($attachment, 'r'), $basename);
             $mimeMessage  = new MixedPart($mimeMessage, $attachedFile);
 
             $this->message->setBody($mimeMessage);