Migrate to SwiftMail

Replaces the OC_Mail and phpmailer with SwiftMail allowing us to mock it properly.

Fixes the unit test execution on master on local machines and https://github.com/owncloud/core/issues/12014

Conflicts:
	3rdparty
	lib/private/server.php
	lib/public/iservercontainer.php
	tests/lib/mail.php
	tests/settings/controller/mailsettingscontrollertest.php

Conflicts:
	3rdparty
	lib/private/mail.php
	lib/private/server.php
	lib/public/iservercontainer.php
	settings/ajax/lostpassword.php
	settings/application.php

20 files changed, 943 insertions, 286 deletions

diff --git a/3rdparty b/3rdparty
-Subproject 7c536152a16f62797b60c6c06f8c2e23eb8b755
+Subproject 08b820614ae99477d7c9319630f400d22b20e2f
diff --git a/core/lostpassword/controller/lostcontroller.php b/core/lostpassword/controller/lostcontroller.php
index c039c578b59..d1a4528d449 100644
--- a/core/lostpassword/controller/lostcontroller.php
+++ b/core/lostpassword/controller/lostcontroller.php
@@ -201,7 +201,7 @@ class LostController extends Controller {
 
 		try {
 			// FIXME: should be added to the container and injected in here
-			\OC_Mail::send(
+			\OCP\Util::sendMail(
 				$email,
 				$user,
 				$this->l10n->t('%s password reset',	array($this->defaults->getName())),
diff --git a/lib/private/mail.php b/lib/private/mail.php
deleted file mode 100644
index 6b7eec6e080..00000000000
--- a/lib/private/mail.php
+++ /dev/null
@@ -1,153 +0,0 @@
-<?php
-/**
- * Copyright (c) 2012 Frank Karlitschek <frank@owncloud.org>
- * This file is licensed under the Affero General Public License version 3 or
- * later.
- * See the COPYING-README file.
- */
-
-/**
- * OC_Mail
- *
- * A class to handle mail sending.
- */
-
-class OC_Mail {
-
-	/**
-	 * send an email
-	 *
-	 * @param string $toaddress
-	 * @param string $toname
-	 * @param string $subject
-	 * @param string $mailtext
-	 * @param string $fromaddress
-	 * @param string $fromname
-	 * @param integer $html
-	 * @param string $altbody
-	 * @param string $ccaddress
-	 * @param string $ccname
-	 * @param string $bcc
-	 * @throws Exception
-	 */
-	public static function send($toaddress, $toname, $subject, $mailtext, $fromaddress, $fromname,
-		$html=0, $altbody='', $ccaddress='', $ccname='', $bcc='') {
-
-		$SMTPMODE = OC_Config::getValue( 'mail_smtpmode', 'sendmail' );
-		$SMTPHOST = OC_Config::getValue( 'mail_smtphost', '127.0.0.1' );
-		$SMTPPORT = OC_Config::getValue( 'mail_smtpport', 25 );
-		$SMTPAUTH = OC_Config::getValue( 'mail_smtpauth', false );
-		$SMTPAUTHTYPE = OC_Config::getValue( 'mail_smtpauthtype', 'LOGIN' );
-		$SMTPUSERNAME = OC_Config::getValue( 'mail_smtpname', '' );
-		$SMTPPASSWORD = OC_Config::getValue( 'mail_smtppassword', '' );
-		$SMTPDEBUG    = OC_Config::getValue( 'mail_smtpdebug', false );
-		$SMTPTIMEOUT  = OC_Config::getValue( 'mail_smtptimeout', 10 );
-		$SMTPSECURE   = OC_Config::getValue( 'mail_smtpsecure', '' );
-
-
-		$mailo = new PHPMailer(true);
-		if($SMTPMODE=='sendmail') {
-			$mailo->IsSendmail();
-		}elseif($SMTPMODE=='smtp') {
-			$mailo->IsSMTP();
-		}elseif($SMTPMODE=='qmail') {
-			$mailo->IsQmail();
-		}else{
-			$mailo->IsMail();
-		}
-
-
-		$mailo->Host = $SMTPHOST;
-		$mailo->Port = $SMTPPORT;
-		$mailo->SMTPAuth = $SMTPAUTH;
-		$mailo->SMTPDebug = $SMTPDEBUG;
-		$mailo->Debugoutput = 'error_log';
-		$mailo->SMTPSecure = $SMTPSECURE;
-		$mailo->AuthType = $SMTPAUTHTYPE;
-		$mailo->Username = $SMTPUSERNAME;
-		$mailo->Password = $SMTPPASSWORD;
-		$mailo->Timeout  = $SMTPTIMEOUT;
-
-		$mailo->From = $fromaddress;
-		$mailo->FromName = $fromname;;
-		$mailo->Sender = $fromaddress;
-		$mailo->XMailer = ' ';
-		try {
-			$toaddress = self::buildAsciiEmail($toaddress);
-			$mailo->AddAddress($toaddress, $toname);
-
-			if($ccaddress != '') $mailo->AddCC($ccaddress, $ccname);
-			if($bcc != '') $mailo->AddBCC($bcc);
-
-			$mailo->AddReplyTo($fromaddress, $fromname);
-
-			$mailo->WordWrap = 78;
-			$mailo->IsHTML($html == 1);
-
-			$mailo->Subject = $subject;
-			if($altbody == '') {
-				$mailo->Body    = $mailtext.OC_MAIL::getfooter();
-				$mailo->AltBody = '';
-			}else{
-				$mailo->Body    = $mailtext;
-				$mailo->AltBody = $altbody;
-			}
-			$mailo->CharSet = 'UTF-8';
-
-			$mailo->Send();
-			unset($mailo);
-			OC_Log::write('mail',
-				'Mail from '.$fromname.' ('.$fromaddress.')'.' to: '.$toname.'('.$toaddress.')'.' subject: '.$subject,
-				OC_Log::DEBUG);
-		} catch (Exception $exception) {
-			OC_Log::write('mail', $exception->getMessage(), OC_Log::ERROR);
-			throw($exception);
-		}
-	}
-
-	/**
-	 * return the footer for a mail
-	 *
-	 */
-	public static function getfooter() {
-
-		$defaults = new OC_Defaults();
-
-		$txt="\n--\n";
-		$txt.=$defaults->getName() . "\n";
-		$txt.=$defaults->getSlogan() . "\n";
-
-		return($txt);
-
-	}
-
-	/**
-	 * @param string $emailAddress a given email address to be validated
-	 * @return bool
-	 */
-	public static function validateAddress($emailAddress) {
-		if (strpos($emailAddress, '@') === false) {
-			return false;
-		}
-		$emailAddress = self::buildAsciiEmail($emailAddress);
-		return PHPMailer::ValidateAddress($emailAddress);
-	}
-
-	/**
-	 * IDN domains will be properly converted to ascii domains.
-	 *
-	 * @param string $emailAddress
-	 * @return string
-	 */
-	public static function buildAsciiEmail($emailAddress) {
-		if (!function_exists('idn_to_ascii')) {
-			return $emailAddress;
-		}
-
-		list($name, $domain) = explode('@', $emailAddress, 2);
-		$domain = idn_to_ascii($domain);
-
-		return "$name@$domain";
-	}
-
-}
diff --git a/lib/private/mail/mailer.php b/lib/private/mail/mailer.php
new file mode 100644
index 00000000000..ff4b0a0ef62
--- /dev/null
+++ b/lib/private/mail/mailer.php
@@ -0,0 +1,154 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\Mail;
+
+use OCP\IConfig;
+use OCP\Mail\IMailer;
+
+/**
+ * Class Mailer provides some basic functions to create a mail message that can be used in combination with
+ * \OC\Mail\Message.
+ *
+ * Example usage:
+ *
+ * 	$mailer = \OC::$server->getMailer();
+ * 	$message = $mailer->createMessage();
+ * 	$message->setSubject('Your Subject');
+ * 	$message->setFrom(array('cloud@domain.org' => 'ownCloud Notifier');
+ * 	$message->setTo(array('recipient@domain.org' => 'Recipient');
+ * 	$message->setBody('The message text');
+ * 	$mailer->send($message);
+ *
+ * This message can then be passed to send() of \OC\Mail\Mailer
+ *
+ * @package OC\Mail
+ */
+class Mailer implements IMailer {
+	/** @var \Swift_SmtpTransport|\Swift_SendmailTransport|\Swift_MailTransport Cached transport */
+	private $instance = null;
+	/** @var IConfig */
+	private $config;
+	/** @var \OC_Defaults */
+	private $defaults;
+
+	/**
+	 * @param IConfig $config
+	 * @param \OC_Defaults $defaults
+	 */
+	function __construct(IConfig $config, \OC_Defaults $defaults) {
+		$this->config = $config;
+		$this->defaults = $defaults;
+	}
+
+	/**
+	 * Creates a new message object that can be passed to send()
+	 *
+	 * @return Message
+	 */
+	public function createMessage() {
+		return new Message(new \Swift_Message());
+	}
+
+	/**
+	 * Send the specified message. Also sets the from address to the value defined in config.php
+	 * if no-one has been passed.
+	 *
+	 * @param Message $message Message to send
+	 * @return string[] Array with failed recipients. Be aware that this depends on the used mail backend and
+	 * therefore should be considered
+	 * @throws \Exception In case it was not possible to send the message. (for example if an invalid mail address
+	 * has been supplied.)
+	 */
+	public function send(Message $message) {
+		if (sizeof($message->getFrom()) === 0) {
+			$message->setFrom(array(\OCP\Util::getDefaultEmailAddress($this->defaults->getName())));
+		}
+
+		$failedRecipients = array();
+
+		$this->getInstance()->send($message->getSwiftMessage(), $failedRecipients);
+
+		return $failedRecipients;
+	}
+
+	/**
+	 * Returns whatever transport is configured within the config
+	 *
+	 * @return \Swift_SmtpTransport|\Swift_SendmailTransport|\Swift_MailTransport
+	 */
+	protected function getInstance() {
+		if (!is_null($this->instance)) {
+			return $this->instance;
+		}
+
+		switch ($this->config->getSystemValue('mail_smtpmode', 'php')) {
+			case 'smtp':
+				$this->instance = $this->getSMTPInstance();
+				break;
+			case 'sendmail':
+				$this->instance = $this->getSendMailInstance();
+				break;
+			default:
+				$this->instance = $this->getMailInstance();
+				break;
+		}
+
+		return $this->instance;
+	}
+
+	/**
+	 * Returns the SMTP transport
+	 *
+	 * @return \Swift_SmtpTransport
+	 */
+	protected function getSmtpInstance() {
+		$transport = \Swift_SmtpTransport::newInstance();
+		$transport->setTimeout($this->config->getSystemValue('mail_smtptimeout', 10));
+		$transport->setHost($this->config->getSystemValue('mail_smtphost', '127.0.0.1'));
+		$transport->setPort($this->config->getSystemValue('mail_smtpport', 25));
+		if ($this->config->getSystemValue('mail_smtpauth', false)) {
+			$transport->setUsername($this->config->getSystemValue('mail_smtpname', ''));
+			$transport->setPassword($this->config->getSystemValue('mail_smtppassword', ''));
+			$transport->setAuthMode($this->config->getSystemValue('mail_smtpauthtype', 'LOGIN'));
+		}
+		$smtpSecurity = $this->config->getSystemValue('mail_smtpsecure', '');
+		if (!empty($smtpSecurity)) {
+			$transport->setEncryption($smtpSecurity);
+		}
+		return $transport;
+	}
+
+	/**
+	 * Returns the sendmail transport
+	 *
+	 * @return \Swift_SendmailTransport
+	 */
+	protected function getSendMailInstance() {
+		switch ($this->config->getSystemValue('mail_smtpmode', 'sendmail')) {
+			case 'qmail':
+				$binaryPath = '/var/qmail/bin/sendmail';
+				break;
+			default:
+				$binaryPath = '/usr/sbin/sendmail';
+				break;
+		}
+
+		return \Swift_SendmailTransport::newInstance($binaryPath . ' -bs');
+	}
+
+	/**
+	 * Returns the mail transport
+	 *
+	 * @return \Swift_MailTransport
+	 */
+	protected function getMailInstance() {
+		return \Swift_MailTransport::newInstance();
+	}
+
+}
diff --git a/lib/private/mail/message.php b/lib/private/mail/message.php
new file mode 100644
index 00000000000..60700196c5f
--- /dev/null
+++ b/lib/private/mail/message.php
@@ -0,0 +1,206 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\Mail;
+
+use Swift_Message;
+
+/**
+ * Class Message provides a wrapper around SwiftMail
+ *
+ * @package OC\Mail
+ */
+class Message {
+	/** @var Swift_Message */
+	private $swiftMessage;
+
+	/**
+	 * @param Swift_Message $swiftMessage
+	 */
+	function __construct(Swift_Message $swiftMessage) {
+		$this->swiftMessage = $swiftMessage;
+	}
+
+	/**
+	 * SwiftMailer does currently not work with IDN domains, this function therefore converts the domains
+	 * FIXME: Remove this once SwiftMailer supports IDN
+	 *
+	 * @param array $addresses Array of mail addresses, key will get converted
+	 * @return array Converted addresses if `idn_to_ascii` exists
+	 */
+	protected function convertAddresses($addresses) {
+		if (!function_exists('idn_to_ascii')) {
+			return $addresses;
+		}
+
+		$convertedAddresses = array();
+
+		foreach($addresses as $email => $readableName) {
+			if(!is_numeric($email)) {
+				list($name, $domain) = explode('@', $email, 2);
+				$domain = idn_to_ascii($domain);
+				$convertedAddresses[$name.'@'.$domain] = $readableName;
+			} else {
+				list($name, $domain) = explode('@', $readableName, 2);
+				$domain = idn_to_ascii($domain);
+				$convertedAddresses[$email] = $name.'@'.$domain;
+			}
+		}
+
+		return $convertedAddresses;
+	}
+
+	/**
+	 * Set the from address of this message.
+	 *
+	 * If no "From" address is used \OC\Mail\Mailer will use mail_from_address and mail_domain from config.php
+	 *
+	 * @param array $addresses Example: array('sender@domain.org', 'other@domain.org' => 'A name')
+	 * @return $this
+	 */
+	public function setFrom(array $addresses) {
+		$addresses = $this->convertAddresses($addresses);
+
+		$this->swiftMessage->setFrom($addresses);
+		return $this;
+	}
+
+	/**
+	 * Get the from address of this message.
+	 *
+	 * @return array
+	 */
+	public function getFrom() {
+		return $this->swiftMessage->getFrom();
+	}
+
+	/**
+	 * Set the to addresses of this message.
+	 *
+	 * @param array $recipients Example: array('recipient@domain.org', 'other@domain.org' => 'A name')
+	 * @return $this
+	 */
+	public function setTo(array $recipients) {
+		$recipients = $this->convertAddresses($recipients);
+
+		$this->swiftMessage->setTo($recipients);
+		return $this;
+	}
+
+	/**
+	 * Get the to address of this message.
+	 *
+	 * @return array
+	 */
+	public function getTo() {
+		return $this->swiftMessage->getTo();
+	}
+
+	/**
+	 * Set the CC recipients of this message.
+	 *
+	 * @param array $recipients Example: array('recipient@domain.org', 'other@domain.org' => 'A name')
+	 * @return $this
+	 */
+	public function setCc(array $recipients) {
+		$recipients = $this->convertAddresses($recipients);
+
+		$this->swiftMessage->setCc($recipients);
+		return $this;
+	}
+
+	/**
+	 * Get the cc address of this message.
+	 *
+	 * @return array
+	 */
+	public function getCc() {
+		return $this->swiftMessage->getCc();
+	}
+
+	/**
+	 * Set the BCC recipients of this message.
+	 *
+	 * @param array $recipients Example: array('recipient@domain.org', 'other@domain.org' => 'A name')
+	 * @return $this
+	 */
+	public function setBcc(array $recipients) {
+		$recipients = $this->convertAddresses($recipients);
+
+		$this->swiftMessage->setBcc($recipients);
+		return $this;
+	}
+
+	/**
+	 * Get the Bcc address of this message.
+	 *
+	 * @return array
+	 */
+	public function getBcc() {
+		return $this->swiftMessage->getBcc();
+	}
+
+	/**
+	 * Set the subject of this message.
+	 *
+	 * @param $subject
+	 * @return $this
+	 */
+	public function setSubject($subject) {
+		$this->swiftMessage->setSubject($subject);
+		return $this;
+	}
+
+	/**
+	 * Get the from subject of this message.
+	 *
+	 * @return string
+	 */
+	public function getSubject() {
+		return $this->swiftMessage->getSubject();
+	}
+
+	/**
+	 * Set the plain-text body of this message.
+	 *
+	 * @param string $body
+	 * @return $this
+	 */
+	public function setPlainBody($body) {
+		$this->swiftMessage->setBody($body);
+		return $this;
+	}
+
+	/**
+	 * Get the plain body of this message.
+	 *
+	 * @return string
+	 */
+	public function getPlainBody() {
+		return $this->swiftMessage->getBody();
+	}
+
+	/**
+	 * Set the HTML body of this message. Consider also sending a plain-text body instead of only an HTML one.
+	 *
+	 * @param string $body
+	 * @return $this
+	 */
+	public function setHtmlBody($body) {
+		$this->swiftMessage->addPart($body, 'text/html');
+		return $this;
+	}
+
+	/**
+	 * Get's the underlying SwiftMessage
+	 * @return Swift_Message
+	 */
+	public function getSwiftMessage() {
+		return $this->swiftMessage;
+	}
+}
diff --git a/lib/private/mail/util.php b/lib/private/mail/util.php
new file mode 100644
index 00000000000..b301e79d492
--- /dev/null
+++ b/lib/private/mail/util.php
@@ -0,0 +1,45 @@
+<?php
+/**
+ * Copyright (c) 2014-2015 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\Mail;
+
+/**
+ * Class Util
+ *
+ * @package OC\Mail
+ */
+class Util {
+	/**
+	 * Checks if an e-mail address is valid
+	 *
+	 * @param string $email Email address to be validated
+	 * @return bool True if the mail address is valid, false otherwise
+	 */
+	public static function validateMailAddress($email) {
+		return \Swift_Validate::email(self::convertEmail($email));
+	}
+
+	/**
+	 * SwiftMailer does currently not work with IDN domains, this function therefore converts the domains
+	 *
+	 * FIXME: Remove this once SwiftMailer supports IDN
+	 *
+	 * @param string $email
+	 * @return string Converted mail address if `idn_to_ascii` exists
+	 */
+	protected static function convertEmail($email) {
+		if (!function_exists('idn_to_ascii') || strpos($email, '@') === false) {
+			return $email;
+		}
+
+		list($name, $domain) = explode('@', $email, 2);
+		$domain = idn_to_ascii($domain);
+		return $name.'@'.$domain;
+	}
+
+}
diff --git a/lib/private/server.php b/lib/private/server.php
index 896abf04a40..a3682dea6b3 100644
--- a/lib/private/server.php
+++ b/lib/private/server.php
@@ -11,6 +11,7 @@ use OC\Command\AsyncBus;
 use OC\Diagnostics\NullQueryLogger;
 use OC\Diagnostics\EventLogger;
 use OC\Diagnostics\QueryLogger;
+use OC\Mail\Mailer;
 use OC\Security\CertificateManager;
 use OC\Files\Node\Root;
 use OC\Files\View;
@@ -312,6 +313,9 @@ class Server extends SimpleContainer implements IServerContainer {
 				$stream
 			);
 		});
+		$this->registerService('Mailer', function(Server $c) {
+			return new Mailer($c->getConfig(), new \OC_Defaults());
+		});
 	}
 
 	/**
@@ -713,6 +717,15 @@ class Server extends SimpleContainer implements IServerContainer {
 	}
 
 	/**
+	 * Creates a new mailer
+	 *
+	 * @return \OCP\Mail\IMailer
+	 */
+	function getMailer() {
+		return $this->query('Mailer');
+	}
+
+	/**
 	 * Get the webroot
 	 *
 	 * @return string
diff --git a/lib/public/iservercontainer.php b/lib/public/iservercontainer.php
index ec23cc52345..20345e61212 100644
--- a/lib/public/iservercontainer.php
+++ b/lib/public/iservercontainer.php
@@ -318,9 +318,15 @@ interface IServerContainer {
 	 * @return \bantu\IniGetWrapper\IniGetWrapper
 	 */
 	 function getIniWrapper();
-
 	/**
 	 * @return \OCP\Command\IBus
 	 */
 	function getCommandBus();
+
+	/**
+	 * Creates a new mailer
+	 *
+	 * @return \OCP\Mail\IMailer
+	 */
+	function getMailer();
 }
diff --git a/lib/public/mail/imailer.php b/lib/public/mail/imailer.php
new file mode 100644
index 00000000000..2a20ead612b
--- /dev/null
+++ b/lib/public/mail/imailer.php
@@ -0,0 +1,49 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCP\Mail;
+use OC\Mail\Message;
+
+/**
+ * Class IMailer provides some basic functions to create a mail message that can be used in combination with
+ * \OC\Mail\Message.
+ *
+ * Example usage:
+ *
+ * 	$mailer = \OC::$server->getMailer();
+ * 	$message = $mailer->createMessage();
+ * 	$message->setSubject('Your Subject');
+ * 	$message->setFrom(array('cloud@domain.org' => 'ownCloud Notifier');
+ * 	$message->setTo(array('recipient@domain.org' => 'Recipient');
+ * 	$message->setBody('The message text');
+ * 	$mailer->send($message);
+ *
+ * This message can then be passed to send() of \OC\Mail\Mailer
+ *
+ * @package OCP\Mail
+ */
+interface IMailer {
+	/**
+	 * Creates a new message object that can be passed to send()
+	 *
+	 * @return Message
+	 */
+	public function createMessage();
+
+	/**
+	 * Send the specified message. Also sets the from address to the value defined in config.php
+	 * if no-one has been passed.
+	 *
+	 * @param Message $message Message to send
+	 * @return string[] Array with failed recipients. Be aware that this depends on the used mail backend and
+	 * therefore should be considered
+	 * @throws \Exception In case it was not possible to send the message. (for example if an invalid mail address
+	 * has been supplied.)
+	 */
+	public function send(Message $message);
+}
diff --git a/lib/public/mail/util.php b/lib/public/mail/util.php
new file mode 100644
index 00000000000..ea59649e620
--- /dev/null
+++ b/lib/public/mail/util.php
@@ -0,0 +1,26 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OCP\Mail;
+
+/**
+ * Class Util provides some helpers for mail addresses
+ *
+ * @package OCP\Mail
+ */
+class Util {
+	/**
+	 * Checks if an e-mail address is valid
+	 *
+	 * @param string $email Email address to be validated
+	 * @return bool True if the mail address is valid, false otherwise
+	 */
+	public static function validateMailAddress($email) {
+		return \OC\Mail\Util::validateMailAddress($email);
+	}
+}
diff --git a/lib/public/util.php b/lib/public/util.php
index aa6cd5ba012..71ab8cabce5 100644
--- a/lib/public/util.php
+++ b/lib/public/util.php
@@ -63,12 +63,31 @@ class Util {
 	 * @param string $ccaddress
 	 * @param string $ccname
 	 * @param string $bcc
+	 * @deprecated Use \OCP\Mail\IMailer instead
 	 */
 	public static function sendMail( $toaddress, $toname, $subject, $mailtext, $fromaddress, $fromname,
 		$html = 0, $altbody = '', $ccaddress = '', $ccname = '', $bcc = '') {
-		// call the internal mail class
-		\OC_MAIL::send($toaddress, $toname, $subject, $mailtext, $fromaddress, $fromname,
-			$html, $altbody, $ccaddress, $ccname, $bcc);
+		$mailer = \OC::$server->getMailer();
+		$message = $mailer->createMessage();
+		$message->setTo(array($toaddress => $toname));
+		$message->setSubject($subject);
+		$message->setPlainBody($mailtext);
+		$message->setFrom(array($fromaddress => $fromname));
+		if($html === 1) {
+			$message->setHTMLBody($altbody);
+		}
+		if(!empty($ccaddress)) {
+			if(!empty($ccname)) {
+				$message->setCc(array($ccaddress => $ccname));
+			} else {
+				$message->setCc(array($ccaddress));
+			}
+		}
+		if(!empty($bcc)) {
+			$message->setBcc(array($bcc));
+		}
+
+		$mailer->send($message);
 	}
 
 	/**
@@ -275,7 +294,7 @@ class Util {
 		$host_name = \OC_Config::getValue('mail_domain', $host_name);
 		$defaultEmailAddress = $user_part.'@'.$host_name;
 
-		if (\OC_Mail::validateAddress($defaultEmailAddress)) {
+		if (\OCP\Mail\Util::validateMailAddress($defaultEmailAddress)) {
 			return $defaultEmailAddress;
 		}
 
diff --git a/settings/application.php b/settings/application.php
index 6fe23447a72..ce47f155ebe 100644
--- a/settings/application.php
+++ b/settings/application.php
@@ -47,7 +47,7 @@ class Application extends App {
 				$c->query('Config'),
 				$c->query('UserSession'),
 				$c->query('Defaults'),
-				$c->query('Mail'),
+				$c->query('Mailer'),
 				$c->query('DefaultMailAddress')
 			);
 		});
@@ -89,7 +89,7 @@ class Application extends App {
 				$c->query('L10N'),
 				$c->query('Logger'),
 				$c->query('Defaults'),
-				$c->query('Mail'),
+				$c->query('Mailer'),
 				$c->query('DefaultMailAddress'),
 				$c->query('URLGenerator'),
 				$c->query('OCP\\App\\IAppManager'),
@@ -151,8 +151,8 @@ class Application extends App {
 		$container->registerService('SubAdminFactory', function(IContainer $c) {
 			return new SubAdminFactory();
 		});
-		$container->registerService('Mail', function(IContainer $c) {
-			return new \OC_Mail;
+		$container->registerService('Mailer', function(IContainer $c) {
+			return $c->query('ServerContainer')->getMailer();
 		});
 		$container->registerService('Defaults', function(IContainer $c) {
 			return new \OC_Defaults;
diff --git a/settings/controller/mailsettingscontroller.php b/settings/controller/mailsettingscontroller.php
index 5874e644abb..43715b82237 100644
--- a/settings/controller/mailsettingscontroller.php
+++ b/settings/controller/mailsettingscontroller.php
@@ -16,6 +16,8 @@ use \OCP\AppFramework\Controller;
 use OCP\IRequest;
 use OCP\IL10N;
 use OCP\IConfig;
+use OCP\Mail\IMailer;
+use OCP\Mail\IMessage;
 
 /**
  * @package OC\Settings\Controller
@@ -30,8 +32,8 @@ class MailSettingsController extends Controller {
 	private $userSession;
 	/** @var \OC_Defaults */
 	private $defaults;
-	/** @var \OC_Mail */
-	private $mail;
+	/** @var IMailer */
+	private $mailer;
 	/** @var string */
 	private $defaultMailAddress;
 
@@ -42,7 +44,7 @@ class MailSettingsController extends Controller {
 	 * @param IConfig $config
 	 * @param Session $userSession
 	 * @param \OC_Defaults $defaults
-	 * @param \OC_Mail $mail
+	 * @param IMailer $mailer
 	 * @param string $defaultMailAddress
 	 */
 	public function __construct($appName,
@@ -51,14 +53,14 @@ class MailSettingsController extends Controller {
 								IConfig $config,
 								Session $userSession,
 								\OC_Defaults $defaults,
-								\OC_Mail $mail,
+								IMailer $mailer,
 								$defaultMailAddress) {
 		parent::__construct($appName, $request);
 		$this->l10n = $l10n;
 		$this->config = $config;
 		$this->userSession = $userSession;
 		$this->defaults = $defaults;
-		$this->mail = $mail;
+		$this->mailer = $mailer;
 		$this->defaultMailAddress = $defaultMailAddress;
 	}
 
diff --git a/settings/controller/userscontroller.php b/settings/controller/userscontroller.php
index a20cbb4050a..507e57ef940 100644
--- a/settings/controller/userscontroller.php
+++ b/settings/controller/userscontroller.php
@@ -26,6 +26,7 @@ use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
 use OCP\IUserSession;
+use OCP\Mail\IMailer;
 
 /**
  * @package OC\Settings\Controller
@@ -47,8 +48,8 @@ class UsersController extends Controller {
 	private $log;
 	/** @var \OC_Defaults */
 	private $defaults;
-	/** @var \OC_Mail */
-	private $mail;
+	/** @var IMailer */
+	private $mailer;
 	/** @var string */
 	private $fromMailAddress;
 	/** @var IURLGenerator */
@@ -71,7 +72,7 @@ class UsersController extends Controller {
 	 * @param IL10N $l10n
 	 * @param ILogger $log
 	 * @param \OC_Defaults $defaults
-	 * @param \OC_Mail $mail
+	 * @param IMailer $mailer
 	 * @param string $fromMailAddress
 	 * @param IURLGenerator $urlGenerator
 	 * @param IAppManager $appManager
@@ -87,7 +88,7 @@ class UsersController extends Controller {
 								IL10N $l10n,
 								ILogger $log,
 								\OC_Defaults $defaults,
-								\OC_Mail $mail,
+								IMailer $mailer,
 								$fromMailAddress,
 								IURLGenerator $urlGenerator,
 								IAppManager $appManager,
@@ -101,7 +102,7 @@ class UsersController extends Controller {
 		$this->l10n = $l10n;
 		$this->log = $log;
 		$this->defaults = $defaults;
-		$this->mail = $mail;
+		$this->mailer = $mailer;
 		$this->fromMailAddress = $fromMailAddress;
 		$this->urlGenerator = $urlGenerator;
 		$this->subAdminFactory = $subAdminFactory;
@@ -263,7 +264,7 @@ class UsersController extends Controller {
 	 */
 	public function create($username, $password, array $groups=array(), $email='') {
 
-		if($email !== '' && !$this->mail->validateAddress($email)) {
+		if($email !== '' && !\OCP\Mail\Util::validateMailAddress($email)) {
 			return new DataResponse(
 				array(
 					'message' => (string)$this->l10n->t('Invalid mail address')
@@ -329,15 +330,13 @@ class UsersController extends Controller {
 				$subject = $this->l10n->t('Your %s account was created', [$this->defaults->getName()]);
 
 				try {
-					$this->mail->send(
-						$email,
-						$username,
-						$subject,
-						$mailContent,
-						$this->fromMailAddress,
-						$this->defaults->getName(),
-						1,
-						$plainTextMailContent);
+					$message = $this->mailer->createMessage();
+					$message->setTo([$email => $username]);
+					$message->setSubject($subject);
+					$message->setHtmlBody($mailContent);
+					$message->setPlainBody($plainTextMailContent);
+					$message->setFrom([$this->fromMailAddress => $this->defaults->getName()]);
+					$this->mailer->send($message);
 				} catch(\Exception $e) {
 					$this->log->error("Can't send new user mail to $email: " . $e->getMessage(), array('app' => 'settings'));
 				}
@@ -444,7 +443,7 @@ class UsersController extends Controller {
 			);
 		}
 
-		if($mailAddress !== '' && !$this->mail->validateAddress($mailAddress)) {
+		if($mailAddress !== '' && ! \OCP\Mail\Util::validateMailAddress($mailAddress)) {
 			return new DataResponse(
 				array(
 					'status' => 'error',
diff --git a/tests/lib/mail.php b/tests/lib/mail.php
deleted file mode 100644
index 813dde1944f..00000000000
--- a/tests/lib/mail.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-/**
- * Copyright (c) 2014 Thomas Müller <deepdiver@owncloud.com>
- * This file is licensed under the Affero General Public License version 3 or
- * later.
- * See the COPYING-README file.
- */
-
-class Test_Mail extends \Test\TestCase {
-
-	/**
-	 * @dataProvider buildAsciiEmailProvider
-	 * @param $expected
-	 * @param $address
-	 */
-	public function testBuildAsciiEmail($expected, $address) {
-		if (!function_exists('idn_to_ascii')) {
-			$this->markTestSkipped(
-				'The intl extension is not available.'
-			);
-		}
-
-		$actual = \OC_Mail::buildAsciiEmail($address);
-		$this->assertEquals($expected, $actual);
-	}
-
-	public function buildAsciiEmailProvider() {
-		return array(
-			array('info@example.com', 'info@example.com'),
-			array('info@xn--cjr6vy5ejyai80u.com', 'info@國際化域名.com'),
-			array('info@xn--mller-kva.de', 'info@müller.de'),
-			array('info@xn--mller-kva.xn--mller-kva.de', 'info@müller.müller.de'),
-		);
-	}
-
-	public function validateMailProvider() {
-		return array(
-			array('infoatexample.com', false),
-			array('info', false),
-		);
-	}
-
-	/**
-	 * @dataProvider validateMailProvider
-	 * @param $address
-	 * @param $expected
-	 */
-	public function testValidateEmail($address, $expected) {
-		$actual = \OC_Mail::validateAddress($address);
-		$this->assertEquals($expected, $actual);
-	}
-
-}
diff --git a/tests/lib/mail/mailer.php b/tests/lib/mail/mailer.php
new file mode 100644
index 00000000000..bd410dd3383
--- /dev/null
+++ b/tests/lib/mail/mailer.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace Test;
+use OC\Mail\Mailer;
+use OCP\IConfig;
+use OC_Defaults;
+
+class MailerTest extends TestCase {
+	/** @var IConfig */
+	private $config;
+	/** @var OC_Defaults */
+	private $defaults;
+	/** @var Mailer */
+	private $mailer;
+
+	function setUp() {
+		parent::setUp();
+
+		$this->config = $this->getMockBuilder('\OCP\IConfig')
+			->disableOriginalConstructor()->getMock();
+		$this->defaults = $this->getMockBuilder('\OC_Defaults')
+			->disableOriginalConstructor()->getMock();
+		$this->mailer = new Mailer($this->config, $this->defaults);
+	}
+
+	public function testGetMailInstance() {
+		$this->assertEquals(\Swift_MailTransport::newInstance(), \Test_Helper::invokePrivate($this->mailer, 'getMailinstance'));
+	}
+
+	public function testGetSendMailInstanceSendMail() {
+		$this->config
+			->expects($this->once())
+			->method('getSystemValue')
+			->with('mail_smtpmode', 'sendmail')
+			->will($this->returnValue('sendmail'));
+
+		$this->assertEquals(\Swift_SendmailTransport::newInstance('/usr/sbin/sendmail -bs'), \Test_Helper::invokePrivate($this->mailer, 'getSendMailInstance'));
+	}
+
+	public function testGetSendMailInstanceSendMailQmail() {
+		$this->config
+			->expects($this->once())
+			->method('getSystemValue')
+			->with('mail_smtpmode', 'sendmail')
+			->will($this->returnValue('qmail'));
+
+		$this->assertEquals(\Swift_SendmailTransport::newInstance('/var/qmail/bin/sendmail -bs'), \Test_Helper::invokePrivate($this->mailer, 'getSendMailInstance'));
+	}
+
+	public function testGetSmtpInstanceDefaults() {
+		$expected = \Swift_SmtpTransport::newInstance();
+		$expected->setHost('127.0.0.1');
+		$expected->setTimeout(10);
+		$expected->setPort(25);
+
+		$this->config
+			->expects($this->any())
+			->method('getSystemValue')
+			->will($this->returnArgument(1));
+
+		$this->assertEquals($expected, \Test_Helper::invokePrivate($this->mailer, 'getSmtpInstance'));
+	}
+
+	public function testGetInstanceDefault() {
+		$this->assertInstanceOf('\Swift_MailTransport', \Test_Helper::invokePrivate($this->mailer, 'getInstance'));
+	}
+
+	public function testGetInstancePhp() {
+		$this->config
+			->expects($this->any())
+			->method('getSystemValue')
+			->will($this->returnValue('php'));
+
+		$this->assertInstanceOf('\Swift_MailTransport', \Test_Helper::invokePrivate($this->mailer, 'getInstance'));
+	}
+
+	public function testGetInstanceSmtp() {
+		$this->config
+			->expects($this->any())
+			->method('getSystemValue')
+			->will($this->returnValue('smtp'));
+
+		$this->assertInstanceOf('\Swift_SmtpTransport', \Test_Helper::invokePrivate($this->mailer, 'getInstance'));
+	}
+
+	public function testGetInstanceSendmail() {
+		$this->config
+			->expects($this->any())
+			->method('getSystemValue')
+			->will($this->returnValue('sendmail'));
+
+		$this->assertInstanceOf('\Swift_SendmailTransport', \Test_Helper::invokePrivate($this->mailer, 'getInstance'));
+	}
+
+	public function testCreateMessage() {
+		$this->assertInstanceOf('\OC\Mail\Message', $this->mailer->createMessage());
+	}
+
+	/**
+	 * @expectedException \Exception
+	 */
+	public function testSendInvalidMailException() {
+		$message = $this->getMockBuilder('\OC\Mail\Message')
+			->disableOriginalConstructor()->getMock();
+		$message->expects($this->once())
+			->method('getSwiftMessage')
+			->will($this->returnValue(new \Swift_Message()));
+
+		$this->mailer->send($message);
+	}
+
+}
diff --git a/tests/lib/mail/message.php b/tests/lib/mail/message.php
new file mode 100644
index 00000000000..0db2017d81e
--- /dev/null
+++ b/tests/lib/mail/message.php
@@ -0,0 +1,161 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace Test;
+
+use OC\Mail\Message;
+use Swift_Message;
+
+class MessageTest extends TestCase {
+	/** @var Swift_Message */
+	private $swiftMessage;
+	/** @var Message */
+	private $message;
+
+	/**
+	 * @return array
+	 */
+	public function mailAddressProvider() {
+		return array(
+			array(array('lukas@owncloud.com' => 'Lukas Reschke'), array('lukas@owncloud.com' => 'Lukas Reschke')),
+			array(array('lukas@owncloud.com' => 'Lukas Reschke', 'lukas@öwnclöüd.com', 'lukäs@owncloud.örg' => 'Lükäs Réschke'),
+				array('lukas@owncloud.com' => 'Lukas Reschke', 'lukas@xn--wncld-iuae2c.com', 'lukäs@owncloud.xn--rg-eka' => 'Lükäs Réschke')),
+			array(array('lukas@öwnclöüd.com'), array('lukas@xn--wncld-iuae2c.com'))
+		);
+	}
+
+	function setUp() {
+		parent::setUp();
+
+		$this->swiftMessage = $this->getMockBuilder('\Swift_Message')
+			->disableOriginalConstructor()->getMock();
+
+		$this->message = new Message($this->swiftMessage);
+	}
+
+	/**
+	 * @dataProvider mailAddressProvider
+	 */
+	public function testConvertAddresses($unconverted, $expected) {
+		$this->assertSame($expected, \Test_Helper::invokePrivate($this->message, 'convertAddresses', array($unconverted)));
+	}
+
+	public function testSetFrom() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('setFrom')
+			->with(array('lukas@owncloud.com'));
+		$this->message->setFrom(array('lukas@owncloud.com'));
+	}
+
+	public function testGetFrom() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('getFrom')
+			->will($this->returnValue(array('lukas@owncloud.com')));
+
+		$this->assertSame(array('lukas@owncloud.com'), $this->message->getFrom());
+	}
+
+	public function testSetTo() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('setTo')
+			->with(array('lukas@owncloud.com'));
+		$this->message->setTo(array('lukas@owncloud.com'));
+	}
+
+	public function testGetTo() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('getTo')
+			->will($this->returnValue(array('lukas@owncloud.com')));
+
+		$this->assertSame(array('lukas@owncloud.com'), $this->message->getTo());
+	}
+
+	public function testSetCc() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('setCc')
+			->with(array('lukas@owncloud.com'));
+		$this->message->setCc(array('lukas@owncloud.com'));
+	}
+
+	public function testGetCc() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('getCc')
+			->will($this->returnValue(array('lukas@owncloud.com')));
+
+		$this->assertSame(array('lukas@owncloud.com'), $this->message->getCc());
+	}
+
+	public function testSetBcc() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('setBcc')
+			->with(array('lukas@owncloud.com'));
+		$this->message->setBcc(array('lukas@owncloud.com'));
+	}
+
+	public function testGetBcc() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('getBcc')
+			->will($this->returnValue(array('lukas@owncloud.com')));
+
+		$this->assertSame(array('lukas@owncloud.com'), $this->message->getBcc());
+	}
+
+	public function testSetSubject() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('setSubject')
+			->with('Fancy Subject');
+
+		$this->message->setSubject('Fancy Subject');
+	}
+
+	public function testGetSubject() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('getSubject')
+			->will($this->returnValue('Fancy Subject'));
+
+		$this->assertSame('Fancy Subject', $this->message->getSubject());
+	}
+
+	public function testSetPlainBody() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('setBody')
+			->with('Fancy Body');
+
+		$this->message->setPlainBody('Fancy Body');
+	}
+
+	public function testGetPlainBody() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('getBody')
+			->will($this->returnValue('Fancy Body'));
+
+		$this->assertSame('Fancy Body', $this->message->getPlainBody());
+	}
+
+	public function testSetHtmlBody() {
+		$this->swiftMessage
+			->expects($this->once())
+			->method('addPart')
+			->with('<blink>Fancy Body</blink>', 'text/html');
+
+		$this->message->setHtmlBody('<blink>Fancy Body</blink>');
+	}
+
+}
diff --git a/tests/lib/mail/util.php b/tests/lib/mail/util.php
new file mode 100644
index 00000000000..04d9d5df256
--- /dev/null
+++ b/tests/lib/mail/util.php
@@ -0,0 +1,39 @@
+<?php
+/**
+ * Copyright (c) 2014 Lukas Reschke <lukas@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace Test;
+use OCP\Mail\Util;
+
+/**
+ * Class Util
+ *
+ * @package OC\Mail
+ */
+class UtilTest extends TestCase {
+
+	/**
+	 * @return array
+	 */
+	public function mailAddressProvider() {
+		return array(
+			array('lukas@owncloud.com', true),
+			array('lukas@localhost', true),
+			array('lukas@192.168.1.1', true),
+			array('lukas@éxämplè.com', true),
+			array('asdf', false),
+			array('lukas@owncloud.org@owncloud.com', false)
+		);
+	}
+
+	/**
+	 * @dataProvider mailAddressProvider
+	 */
+	public function testValidateMailAddress($email, $expected) {
+		$this->assertSame($expected, Util::validateMailAddress($email));
+	}
+}
diff --git a/tests/settings/controller/mailsettingscontrollertest.php b/tests/settings/controller/mailsettingscontrollertest.php
index ed33d7fbe49..84432f656bf 100644
--- a/tests/settings/controller/mailsettingscontrollertest.php
+++ b/tests/settings/controller/mailsettingscontrollertest.php
@@ -30,7 +30,7 @@ class MailSettingsControllerTest extends \Test\TestCase {
 		$this->container['AppName'] = 'settings';
 		$this->container['UserSession'] = $this->getMockBuilder('\OC\User\Session')
 			->disableOriginalConstructor()->getMock();
-		$this->container['Mail'] = $this->getMockBuilder('\OC_Mail')
+		$this->container['MailMessage'] = $this->getMockBuilder('\OCP\Mail\IMessage')
 			->disableOriginalConstructor()->getMock();
 		$this->container['Defaults'] = $this->getMockBuilder('\OC_Defaults')
 			->disableOriginalConstructor()->getMock();
@@ -152,12 +152,6 @@ class MailSettingsControllerTest extends \Test\TestCase {
 	}
 
 	public function testSendTestMail() {
-		/**
-		 * FIXME: Disabled due to missing DI on mail class. 
-		 * TODO: Re-enable when https://github.com/owncloud/core/pull/12085 is merged.
-		 */
-		$this->markTestSkipped('Disable test until OC_Mail is rewritten.');
-		
 		$user = $this->getMockBuilder('\OC\User\User')
 			->disableOriginalConstructor()
 			->getMock();
diff --git a/tests/settings/controller/userscontrollertest.php b/tests/settings/controller/userscontrollertest.php
index b813da038a3..3f69d1e7d18 100644
--- a/tests/settings/controller/userscontrollertest.php
+++ b/tests/settings/controller/userscontrollertest.php
@@ -45,7 +45,7 @@ class UsersControllerTest extends \Test\TestCase {
 			}));
 		$this->container['Defaults'] = $this->getMockBuilder('\OC_Defaults')
 			->disableOriginalConstructor()->getMock();
-		$this->container['Mail'] = $this->getMockBuilder('\OC_Mail')
+		$this->container['Mailer'] = $this->getMockBuilder('\OCP\Mail\IMailer')
 			->disableOriginalConstructor()->getMock();
 		$this->container['DefaultMailAddress'] = 'no-reply@owncloud.com';
 		$this->container['Logger'] = $this->getMockBuilder('\OCP\ILogger')
@@ -1151,24 +1151,12 @@ class UsersControllerTest extends \Test\TestCase {
 	public function testCreateUnsuccessfulWithInvalidEmailAdmin() {
 		$this->container['IsAdmin'] = true;
 
-		/**
-		 * FIXME: Disabled due to missing DI on mail class.
-		 * TODO: Re-enable when https://github.com/owncloud/core/pull/12085 is merged.
-		 */
-		$this->markTestSkipped('Disable test until OC_Mail is rewritten.');
-
-		$this->container['Mail']
-			->expects($this->once())
-			->method('validateAddress')
-			->will($this->returnValue(false));
-
-		$expectedResponse = new DataResponse(
-			array(
-				'message' => 'Invalid mail address'
-			),
+		$expectedResponse = new DataResponse([
+				'message' => 'Invalid mail address',
+			],
 			Http::STATUS_UNPROCESSABLE_ENTITY
 		);
-		$response = $this->container['UsersController']->create('foo', 'password', array(), 'invalidMailAdress');
+		$response = $this->container['UsersController']->create('foo', 'password', [], 'invalidMailAdress');
 		$this->assertEquals($expectedResponse, $response);
 	}
 
@@ -1177,35 +1165,79 @@ class UsersControllerTest extends \Test\TestCase {
 	 */
 	public function testCreateSuccessfulWithValidEmailAdmin() {
 		$this->container['IsAdmin'] = true;
+		$message = $this->getMockBuilder('\OC\Mail\Message')
+			->disableOriginalConstructor()->getMock();
+		$message
+			->expects($this->at(0))
+			->method('setTo')
+			->with(['validMail@Adre.ss' => 'foo']);
+		$message
+			->expects($this->at(1))
+			->method('setSubject')
+			->with('Your  account was created');
+		$htmlBody = new Http\TemplateResponse(
+			'settings',
+			'email.new_user',
+			[
+				'username' => 'foo',
+				'url' => '',
+			],
+			'blank'
+		);
+		$message
+			->expects($this->at(2))
+			->method('setHtmlBody')
+			->with($htmlBody->render());
+		$plainBody = new Http\TemplateResponse(
+			'settings',
+			'email.new_user_plain_text',
+			[
+				'username' => 'foo',
+				'url' => '',
+			],
+			'blank'
+		);
+		$message
+			->expects($this->at(3))
+			->method('setPlainBody')
+			->with($plainBody->render());
+		$message
+			->expects($this->at(4))
+			->method('setFrom')
+			->with(['no-reply@owncloud.com' => null]);
+
+		$this->container['Mailer']
+			->expects($this->at(0))
+			->method('createMessage')
+			->will($this->returnValue($message));
+		$this->container['Mailer']
+			->expects($this->at(1))
+			->method('send')
+			->with($message);
 
-		/**
-		 * FIXME: Disabled due to missing DI on mail class.
-		 * TODO: Re-enable when https://github.com/owncloud/core/pull/12085 is merged.
-		 */
-		$this->markTestSkipped('Disable test until OC_Mail is rewritten.');
-
-		$this->container['Mail']
+		$user = $this->getMockBuilder('\OC\User\User')
+			->disableOriginalConstructor()->getMock();
+		$user
+			->method('getHome')
+			->will($this->returnValue('/home/user'));
+		$user
+			->method('getHome')
+			->will($this->returnValue('/home/user'));
+		$user
+			->method('getUID')
+			->will($this->returnValue('foo'));
+		$user
 			->expects($this->once())
-			->method('validateAddress')
-			->will($this->returnValue(true));
-		$this->container['Mail']
+			->method('getBackendClassName')
+			->will($this->returnValue('bar'));
+
+		$this->container['UserManager']
 			->expects($this->once())
-			->method('send')
-			->with(
-				$this->equalTo('validMail@Adre.ss'),
-				$this->equalTo('foo'),
-				$this->anything(),
-				$this->anything(),
-				$this->anything(),
-				$this->equalTo('no-reply@owncloud.com'),
-				$this->equalTo(1),
-				$this->anything()
-			);
-		$this->container['Logger']
-			->expects($this->never())
-			->method('error');
+			->method('createUser')
+			->will($this->onConsecutiveCalls($user));
+
 
-		$response = $this->container['UsersController']->create('foo', 'password', array(), 'validMail@Adre.ss');
+		$response = $this->container['UsersController']->create('foo', 'password', [], 'validMail@Adre.ss');
 		$this->assertEquals(Http::STATUS_CREATED, $response->getStatus());
 	}