Added Quoted-Printable encoding for attachment message bodies. (#28)

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class.simple_mail.php

@@ -445,10 +445,10 @@ public function assembleAttachmentBody()
         $body = array();
         $body[] = "This is a multi-part message in MIME format.";
         $body[] = "--{$this->_uid}";
-        $body[] = "Content-type:text/html; charset=\"utf-8\"";
-        $body[] = "Content-Transfer-Encoding: 7bit";
+        $body[] = "Content-Type: text/html; charset=\"utf-8\"";
+        $body[] = "Content-Transfer-Encoding: quoted-printable";
         $body[] = "";
-        $body[] = $this->_message;
+        $body[] = quoted_printable_encode($this->_message);
         $body[] = "";
         $body[] = "--{$this->_uid}";
 

tests/class.simple_mail.test.php

@@ -525,6 +525,20 @@ public function it_filters_angle_brackets_from_emails()
         $this->assertEquals($expected, $name);
     }
 
+    /**
+     * @test
+     */
+    public function it_qp_encodes_attachment_message_bodies()
+    {
+        $message = "J'interdis aux marchands de vanter trop leur marchandises. Car ils se font vite pédagogues et t'enseignent comme but ce qui n'est par essence qu'un moyen, et te trompant ainsi sur la route à suivre les voilà bientôt qui te dégradent, car si leur musique est vulgaire ils te fabriquent pour te la vendre une âme vulgaire.";
+
+        $this->mailer->setMessage($message)
+                     ->addAttachment($this->directory.'/example/pbXBsZSwgY2hh.jpg', 'lolcat_finally_arrived.jpg');
+
+        $body = $this->mailer->assembleAttachmentBody();
+        $this->assertRegExp('/^Content-Transfer-Encoding: quoted-printable$/m', $body);
+    }
+
     public function tearDown()
     {
         unset($this->mailer);