public function send(DataContainer $dc)
	{
		$objNewsletter = $this->Database->prepare("SELECT n.*, c.template AS channelTemplate, c.sender AS channelSender, c.senderName as channelSenderName FROM tl_newsletter n LEFT JOIN tl_newsletter_channel c ON n.pid=c.id WHERE n.id=?")
										->limit(1)
										->execute($dc->id);

		// Return if there is no newsletter
		if ($objNewsletter->numRows < 1)
		{
			return '';
		}

		// Set the template
		if ($objNewsletter->template == '')
		{
			$objNewsletter->template = $objNewsletter->channelTemplate;
		}

		// Set the sender address
		if ($objNewsletter->sender == '')
		{
			$objNewsletter->sender = $objNewsletter->channelSender;
		}

		// Set the sender name
		if ($objNewsletter->senderName == '')
		{
			$objNewsletter->senderName = $objNewsletter->channelSenderName;
		}

		// No sender address given
		if ($objNewsletter->sender == '')
		{
			throw new InternalServerErrorException('No sender address given. Please check the newsletter channel settings.');
		}

		$arrAttachments = array();

		// Add attachments
		if ($objNewsletter->addFile)
		{
			$files = StringUtil::deserialize($objNewsletter->files);

			if (!empty($files) && \is_array($files))
			{
				$objFiles = FilesModel::findMultipleByUuids($files);

				if ($objFiles !== null)
				{
					$rootDir = System::getContainer()->getParameter('kernel.project_dir');

					while ($objFiles->next())
					{
						if (is_file($rootDir . '/' . $objFiles->path))
						{
							$arrAttachments[] = $objFiles->path;
						}
					}
				}
			}
		}

		// Replace insert tags
		$html = $this->replaceInsertTags($objNewsletter->content, false);
		$text = $this->replaceInsertTags($objNewsletter->text, false);

		// Convert relative URLs
		if ($objNewsletter->externalImages)
		{
			$html = $this->convertRelativeUrls($html);
		}

		/** @var Session $objSession */
		$objSession = System::getContainer()->get('session');

		// Send newsletter
		if (Input::get('token') != '' && Input::get('token') == $objSession->get('tl_newsletter_send'))
		{
			$referer = preg_replace('/&(amp;)?(start|mpc|token|recipient|preview)=[^&]*/', '', Environment::get('request'));

			// Preview
			if (isset($_GET['preview']))
			{
				// Check the e-mail address
				if (!Validator::isEmail(Input::get('recipient', true)))
				{
					$_SESSION['TL_PREVIEW_MAIL_ERROR'] = true;
					$this->redirect($referer);
				}

				$arrRecipient['email'] = urldecode(Input::get('recipient', true));

				// Send
				$objEmail = $this->generateEmailObject($objNewsletter, $arrAttachments);
				$this->sendNewsletter($objEmail, $objNewsletter, $arrRecipient, $text, $html);

				// Redirect
				Message::addConfirmation(sprintf($GLOBALS['TL_LANG']['tl_newsletter']['confirm'], 1));
				$this->redirect($referer);
			}

			// Get the total number of recipients
			$objTotal = $this->Database->prepare("SELECT COUNT(DISTINCT email) AS count FROM tl_newsletter_recipients WHERE pid=? AND active=1")
									   ->execute($objNewsletter->pid);

			// Return if there are no recipients
			if ($objTotal->count < 1)
			{
				$objSession->set('tl_newsletter_send', null);
				Message::addError($GLOBALS['TL_LANG']['tl_newsletter']['error']);
				$this->redirect($referer);
			}

			$intTotal = $objTotal->count;

			// Get page and timeout
			$intTimeout = (Input::get('timeout') > 0) ? Input::get('timeout') : 1;
			$intStart = Input::get('start') ?: 0;
			$intPages = Input::get('mpc') ?: 10;

			// Get recipients
			$objRecipients = $this->Database->prepare("SELECT *, r.email FROM tl_newsletter_recipients r LEFT JOIN tl_member m ON(r.email=m.email) WHERE r.pid=? AND r.active=1 ORDER BY r.email")
											->limit($intPages, $intStart)
											->execute($objNewsletter->pid);

			echo '<div style="font-family:Verdana,sans-serif;font-size:11px;line-height:16px;margin-bottom:12px">';

			// Send newsletter
			if ($objRecipients->numRows > 0)
			{
				// Update status
				if ($intStart == 0)
				{
					$this->Database->prepare("UPDATE tl_newsletter SET sent='1', date=? WHERE id=?")
								   ->execute(time(), $objNewsletter->id);

					$_SESSION['REJECTED_RECIPIENTS'] = array();
				}

				while ($objRecipients->next())
				{
					// Skip the recipient if the member is not active (see #8812)
					if ($objRecipients->id !== null && ($objRecipients->disable || ($objRecipients->start != '' && $objRecipients->start > time()) || ($objRecipients->stop != '' && $objRecipients->stop < time())))
					{
						--$intTotal;
						echo 'Skipping <strong>' . Idna::decodeEmail($objRecipients->email) . '</strong> as the member is not active<br>';
						continue;
					}

					$objEmail = $this->generateEmailObject($objNewsletter, $arrAttachments);
					$this->sendNewsletter($objEmail, $objNewsletter, $objRecipients->row(), $text, $html);

					echo 'Sending newsletter to <strong>' . Idna::decodeEmail($objRecipients->email) . '</strong><br>';
				}
			}

			echo '<div style="margin-top:12px">';

			// Redirect back home
			if ($objRecipients->numRows < 1 || ($intStart + $intPages) >= $intTotal)
			{
				$objSession->set('tl_newsletter_send', null);

				// Deactivate rejected addresses
				if (!empty($_SESSION['REJECTED_RECIPIENTS']))
				{
					$intRejected = \count($_SESSION['REJECTED_RECIPIENTS']);
					Message::addInfo(sprintf($GLOBALS['TL_LANG']['tl_newsletter']['rejected'], $intRejected));
					$intTotal -= $intRejected;

					foreach ($_SESSION['REJECTED_RECIPIENTS'] as $strRecipient)
					{
						$this->Database->prepare("UPDATE tl_newsletter_recipients SET active='' WHERE email=?")
									   ->execute($strRecipient);

						$this->log('Recipient address "' . Idna::decodeEmail($strRecipient) . '" was rejected and has been deactivated', __METHOD__, TL_ERROR);
					}
				}

				Message::addConfirmation(sprintf($GLOBALS['TL_LANG']['tl_newsletter']['confirm'], $intTotal));

				echo '<script>setTimeout(\'window.location="' . Environment::get('base') . $referer . '"\',1000)</script>';
				echo '<a href="' . Environment::get('base') . $referer . '">Please click here to proceed if you are not using JavaScript</a>';
			}

			// Redirect to the next cycle
			else
			{
				$url = preg_replace('/&(amp;)?(start|mpc|recipient)=[^&]*/', '', Environment::get('request')) . '&start=' . ($intStart + $intPages) . '&mpc=' . $intPages;

				echo '<script>setTimeout(\'window.location="' . Environment::get('base') . $url . '"\',' . ($intTimeout * 1000) . ')</script>';
				echo '<a href="' . Environment::get('base') . $url . '">Please click here to proceed if you are not using JavaScript</a>';
			}

			echo '</div></div>';
			exit;
		}

		$strToken = md5(uniqid(mt_rand(), true));
		$objSession->set('tl_newsletter_send', $strToken);
		$sprintf = ($objNewsletter->senderName != '') ? $objNewsletter->senderName . ' &lt;%s&gt;' : '%s';
		$this->import(BackendUser::class, 'User');

		// Preview newsletter
		$return = Message::generate() . '
<div id="tl_buttons">
<a href="'.$this->getReferer(true).'" class="header_back" title="'.StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['backBTTitle']).'" accesskey="b">'.$GLOBALS['TL_LANG']['MSC']['backBT'].'</a>
</div>
<form action="'.TL_SCRIPT.'" id="tl_newsletter_send" class="tl_form tl_edit_form" method="get">
<div class="tl_formbody_edit tl_newsletter_send">
<input type="hidden" name="do" value="' . Input::get('do') . '">
<input type="hidden" name="table" value="' . Input::get('table') . '">
<input type="hidden" name="key" value="' . Input::get('key') . '">
<input type="hidden" name="id" value="' . Input::get('id') . '">
<input type="hidden" name="token" value="' . $strToken . '">
<table class="prev_header">
  <tr class="row_0">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['from'] . '</td>
    <td class="col_1">' . sprintf($sprintf, Idna::decodeEmail($objNewsletter->sender)) . '</td>
  </tr>
  <tr class="row_1">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['subject'][0] . '</td>
    <td class="col_1">' . $objNewsletter->subject . '</td>
  </tr>
  <tr class="row_2">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['template'][0] . '</td>
    <td class="col_1">' . $objNewsletter->template . '</td>
  </tr>' . ((!empty($arrAttachments) && \is_array($arrAttachments)) ? '
  <tr class="row_3">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['attachments'] . '</td>
    <td class="col_1">' . implode(', ', $arrAttachments) . '</td>
  </tr>' : '') . '
</table>' . (!$objNewsletter->sendText ? '
<div class="preview_html">
' . $html . '
</div>' : '') . '
<div class="preview_text">
<pre style="white-space:pre-wrap">' . $text . '</pre>
</div>

<fieldset class="tl_tbox nolegend">
<div class="w50 widget">
  <h3><label for="ctrl_mpc">' . $GLOBALS['TL_LANG']['tl_newsletter']['mailsPerCycle'][0] . '</label></h3>
  <input type="text" name="mpc" id="ctrl_mpc" value="10" class="tl_text" onfocus="Backend.getScrollOffset()">' . (($GLOBALS['TL_LANG']['tl_newsletter']['mailsPerCycle'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . $GLOBALS['TL_LANG']['tl_newsletter']['mailsPerCycle'][1] . '</p>' : '') . '
</div>
<div class="w50 widget">
  <h3><label for="ctrl_timeout">' . $GLOBALS['TL_LANG']['tl_newsletter']['timeout'][0] . '</label></h3>
  <input type="text" name="timeout" id="ctrl_timeout" value="1" class="tl_text" onfocus="Backend.getScrollOffset()">' . (($GLOBALS['TL_LANG']['tl_newsletter']['timeout'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . $GLOBALS['TL_LANG']['tl_newsletter']['timeout'][1] . '</p>' : '') . '
</div>
<div class="w50 widget">
  <h3><label for="ctrl_start">' . $GLOBALS['TL_LANG']['tl_newsletter']['start'][0] . '</label></h3>
  <input type="text" name="start" id="ctrl_start" value="0" class="tl_text" onfocus="Backend.getScrollOffset()">' . (($GLOBALS['TL_LANG']['tl_newsletter']['start'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . sprintf($GLOBALS['TL_LANG']['tl_newsletter']['start'][1], $objNewsletter->id) . '</p>' : '') . '
</div>
<div class="w50 widget">
  <h3><label for="ctrl_recipient">' . $GLOBALS['TL_LANG']['tl_newsletter']['sendPreviewTo'][0] . '</label></h3>
  <input type="text" name="recipient" id="ctrl_recipient" value="'.Idna::decodeEmail($this->User->email).'" class="tl_text" onfocus="Backend.getScrollOffset()">' . (isset($_SESSION['TL_PREVIEW_MAIL_ERROR']) ? '
  <div class="tl_error">' . $GLOBALS['TL_LANG']['ERR']['email'] . '</div>' : (($GLOBALS['TL_LANG']['tl_newsletter']['sendPreviewTo'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . $GLOBALS['TL_LANG']['tl_newsletter']['sendPreviewTo'][1] . '</p>' : '')) . '
</div>
</fieldset>
</div>';

		$return .= '

<div class="tl_formbody_submit">
<div class="tl_submit_container">
<button type="submit" name="preview" class="tl_submit" accesskey="p">'.$GLOBALS['TL_LANG']['tl_newsletter']['preview'].'</button>
<button type="submit" id="send" class="tl_submit" accesskey="s" onclick="return confirm(\''. str_replace("'", "\\'", $GLOBALS['TL_LANG']['tl_newsletter']['sendConfirm']) .'\')">'.$GLOBALS['TL_LANG']['tl_newsletter']['send'][0].'</button>
</div>
</div>

</form>';

		unset($_SESSION['TL_PREVIEW_MAIL_ERROR']);

		return $return;
	}
public function send(DataContainer $dc)
	{
		$objNewsletter = $this->Database->prepare("SELECT n.*, c.template AS channelTemplate, c.sender AS channelSender, c.senderName as channelSenderName FROM tl_newsletter n LEFT JOIN tl_newsletter_channel c ON n.pid=c.id WHERE n.id=?")
										->limit(1)
										->execute($dc->id);

		// Return if there is no newsletter
		if ($objNewsletter->numRows < 1)
		{
			return '';
		}

		// Set the template
		if ($objNewsletter->template == '')
		{
			$objNewsletter->template = $objNewsletter->channelTemplate;
		}

		// Set the sender address
		if ($objNewsletter->sender == '')
		{
			$objNewsletter->sender = $objNewsletter->channelSender;
		}

		// Set the sender name
		if ($objNewsletter->senderName == '')
		{
			$objNewsletter->senderName = $objNewsletter->channelSenderName;
		}

		// No sender address given
		if ($objNewsletter->sender == '')
		{
			throw new InternalServerErrorException('No sender address given. Please check the newsletter channel settings.');
		}

		$arrAttachments = array();

		// Add attachments
		if ($objNewsletter->addFile)
		{
			$files = StringUtil::deserialize($objNewsletter->files);

			if (!empty($files) && \is_array($files))
			{
				$objFiles = FilesModel::findMultipleByUuids($files);

				if ($objFiles !== null)
				{
					$rootDir = System::getContainer()->getParameter('kernel.project_dir');

					while ($objFiles->next())
					{
						if (is_file($rootDir . '/' . $objFiles->path))
						{
							$arrAttachments[] = $objFiles->path;
						}
					}
				}
			}
		}

		// Replace insert tags
		$html = $this->replaceInsertTags($objNewsletter->content, false);
		$text = $this->replaceInsertTags($objNewsletter->text, false);

		// Convert relative URLs
		if ($objNewsletter->externalImages)
		{
			$html = $this->convertRelativeUrls($html);
		}

		/** @var Session $objSession */
		$objSession = System::getContainer()->get('session');

		// Send newsletter
		if (Input::get('token') != '' && Input::get('token') == $objSession->get('tl_newsletter_send'))
		{
			$referer = preg_replace('/&(amp;)?(start|mpc|token|recipient|preview)=[^&]*/', '', Environment::get('request'));

			// Preview
			if (isset($_GET['preview']))
			{
				// Check the e-mail address
				if (!Validator::isEmail(Input::get('recipient', true)))
				{
					$_SESSION['TL_PREVIEW_MAIL_ERROR'] = true;
					$this->redirect($referer);
				}

				$arrRecipient['email'] = urldecode(Input::get('recipient', true));

				// Send
				$objEmail = $this->generateEmailObject($objNewsletter, $arrAttachments);
				$this->sendNewsletter($objEmail, $objNewsletter, $arrRecipient, $text, $html);

				// Redirect
				Message::addConfirmation(sprintf($GLOBALS['TL_LANG']['tl_newsletter']['confirm'], 1));
				$this->redirect($referer);
			}

			// Get the total number of recipients
			$objTotal = $this->Database->prepare("SELECT COUNT(DISTINCT email) AS count FROM tl_newsletter_recipients WHERE pid=? AND active=1")
									   ->execute($objNewsletter->pid);

			// Return if there are no recipients
			if ($objTotal->count < 1)
			{
				$objSession->set('tl_newsletter_send', null);
				Message::addError($GLOBALS['TL_LANG']['tl_newsletter']['error']);
				$this->redirect($referer);
			}

			$intTotal = $objTotal->count;

			// Get page and timeout
			$intTimeout = (Input::get('timeout') > 0) ? Input::get('timeout') : 1;
			$intStart = Input::get('start') ?: 0;
			$intPages = Input::get('mpc') ?: 10;

			// Get recipients
			$objRecipients = $this->Database->prepare("SELECT *, r.email FROM tl_newsletter_recipients r LEFT JOIN tl_member m ON(r.email=m.email) WHERE r.pid=? AND r.active=1 ORDER BY r.email")
											->limit($intPages, $intStart)
											->execute($objNewsletter->pid);

			echo '<div style="font-family:Verdana,sans-serif;font-size:11px;line-height:16px;margin-bottom:12px">';

			// Send newsletter
			if ($objRecipients->numRows > 0)
			{
				// Update status
				if ($intStart == 0)
				{
					$this->Database->prepare("UPDATE tl_newsletter SET sent='1', date=? WHERE id=?")
								   ->execute(time(), $objNewsletter->id);

					$_SESSION['REJECTED_RECIPIENTS'] = array();
				}

				while ($objRecipients->next())
				{
					// Skip the recipient if the member is not active (see #8812)
					if ($objRecipients->id !== null && ($objRecipients->disable || ($objRecipients->start != '' && $objRecipients->start > time()) || ($objRecipients->stop != '' && $objRecipients->stop < time())))
					{
						--$intTotal;
						echo 'Skipping <strong>' . Idna::decodeEmail($objRecipients->email) . '</strong> as the member is not active<br>';
						continue;
					}

					$objEmail = $this->generateEmailObject($objNewsletter, $arrAttachments);
					$this->sendNewsletter($objEmail, $objNewsletter, $objRecipients->row(), $text, $html);

					echo 'Sending newsletter to <strong>' . Idna::decodeEmail($objRecipients->email) . '</strong><br>';
				}
			}

			echo '<div style="margin-top:12px">';

			// Redirect back home
			if ($objRecipients->numRows < 1 || ($intStart + $intPages) >= $intTotal)
			{
				$objSession->set('tl_newsletter_send', null);

				// Deactivate rejected addresses
				if (!empty($_SESSION['REJECTED_RECIPIENTS']))
				{
					$intRejected = \count($_SESSION['REJECTED_RECIPIENTS']);
					Message::addInfo(sprintf($GLOBALS['TL_LANG']['tl_newsletter']['rejected'], $intRejected));
					$intTotal -= $intRejected;

					foreach ($_SESSION['REJECTED_RECIPIENTS'] as $strRecipient)
					{
						$this->Database->prepare("UPDATE tl_newsletter_recipients SET active='' WHERE email=?")
									   ->execute($strRecipient);

						$this->log('Recipient address "' . Idna::decodeEmail($strRecipient) . '" was rejected and has been deactivated', __METHOD__, TL_ERROR);
					}
				}

				Message::addConfirmation(sprintf($GLOBALS['TL_LANG']['tl_newsletter']['confirm'], $intTotal));

				echo '<script>setTimeout(\'window.location="' . Environment::get('base') . $referer . '"\',1000)</script>';
				echo '<a href="' . Environment::get('base') . $referer . '">Please click here to proceed if you are not using JavaScript</a>';
			}

			// Redirect to the next cycle
			else
			{
				$url = preg_replace('/&(amp;)?(start|mpc|recipient)=[^&]*/', '', Environment::get('request')) . '&start=' . ($intStart + $intPages) . '&mpc=' . $intPages;

				echo '<script>setTimeout(\'window.location="' . Environment::get('base') . $url . '"\',' . ($intTimeout * 1000) . ')</script>';
				echo '<a href="' . Environment::get('base') . $url . '">Please click here to proceed if you are not using JavaScript</a>';
			}

			echo '</div></div>';
			exit;
		}

		$strToken = md5(uniqid(mt_rand(), true));
		$objSession->set('tl_newsletter_send', $strToken);
		$sprintf = ($objNewsletter->senderName != '') ? $objNewsletter->senderName . ' &lt;%s&gt;' : '%s';
		$this->import(BackendUser::class, 'User');

		// Preview newsletter
		$return = Message::generate() . '
<div id="tl_buttons">
<a href="'.$this->getReferer(true).'" class="header_back" title="'.StringUtil::specialchars($GLOBALS['TL_LANG']['MSC']['backBTTitle']).'" accesskey="b">'.$GLOBALS['TL_LANG']['MSC']['backBT'].'</a>
</div>
<form action="'.TL_SCRIPT.'" id="tl_newsletter_send" class="tl_form tl_edit_form" method="get">
<div class="tl_formbody_edit tl_newsletter_send">
<input type="hidden" name="do" value="' . Input::get('do') . '">
<input type="hidden" name="table" value="' . Input::get('table') . '">
<input type="hidden" name="key" value="' . Input::get('key') . '">
<input type="hidden" name="id" value="' . Input::get('id') . '">
<input type="hidden" name="token" value="' . $strToken . '">
<table class="prev_header">
  <tr class="row_0">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['from'] . '</td>
    <td class="col_1">' . sprintf($sprintf, Idna::decodeEmail($objNewsletter->sender)) . '</td>
  </tr>
  <tr class="row_1">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['subject'][0] . '</td>
    <td class="col_1">' . $objNewsletter->subject . '</td>
  </tr>
  <tr class="row_2">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['template'][0] . '</td>
    <td class="col_1">' . $objNewsletter->template . '</td>
  </tr>' . ((!empty($arrAttachments) && \is_array($arrAttachments)) ? '
  <tr class="row_3">
    <td class="col_0">' . $GLOBALS['TL_LANG']['tl_newsletter']['attachments'] . '</td>
    <td class="col_1">' . implode(', ', $arrAttachments) . '</td>
  </tr>' : '') . '
</table>' . (!$objNewsletter->sendText ? '
<div class="preview_html">
' . $html . '
</div>' : '') . '
<div class="preview_text">
<pre style="white-space:pre-wrap">' . $text . '</pre>
</div>

<fieldset class="tl_tbox nolegend">
<div class="w50 widget">
  <h3><label for="ctrl_mpc">' . $GLOBALS['TL_LANG']['tl_newsletter']['mailsPerCycle'][0] . '</label></h3>
  <input type="text" name="mpc" id="ctrl_mpc" value="10" class="tl_text" onfocus="Backend.getScrollOffset()">' . (($GLOBALS['TL_LANG']['tl_newsletter']['mailsPerCycle'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . $GLOBALS['TL_LANG']['tl_newsletter']['mailsPerCycle'][1] . '</p>' : '') . '
</div>
<div class="w50 widget">
  <h3><label for="ctrl_timeout">' . $GLOBALS['TL_LANG']['tl_newsletter']['timeout'][0] . '</label></h3>
  <input type="text" name="timeout" id="ctrl_timeout" value="1" class="tl_text" onfocus="Backend.getScrollOffset()">' . (($GLOBALS['TL_LANG']['tl_newsletter']['timeout'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . $GLOBALS['TL_LANG']['tl_newsletter']['timeout'][1] . '</p>' : '') . '
</div>
<div class="w50 widget">
  <h3><label for="ctrl_start">' . $GLOBALS['TL_LANG']['tl_newsletter']['start'][0] . '</label></h3>
  <input type="text" name="start" id="ctrl_start" value="0" class="tl_text" onfocus="Backend.getScrollOffset()">' . (($GLOBALS['TL_LANG']['tl_newsletter']['start'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . sprintf($GLOBALS['TL_LANG']['tl_newsletter']['start'][1], $objNewsletter->id) . '</p>' : '') . '
</div>
<div class="w50 widget">
  <h3><label for="ctrl_recipient">' . $GLOBALS['TL_LANG']['tl_newsletter']['sendPreviewTo'][0] . '</label></h3>
  <input type="text" name="recipient" id="ctrl_recipient" value="'.Idna::decodeEmail($this->User->email).'" class="tl_text" onfocus="Backend.getScrollOffset()">' . (isset($_SESSION['TL_PREVIEW_MAIL_ERROR']) ? '
  <div class="tl_error">' . $GLOBALS['TL_LANG']['ERR']['email'] . '</div>' : (($GLOBALS['TL_LANG']['tl_newsletter']['sendPreviewTo'][1] && Config::get('showHelp')) ? '
  <p class="tl_help tl_tip">' . $GLOBALS['TL_LANG']['tl_newsletter']['sendPreviewTo'][1] . '</p>' : '')) . '
</div>
</fieldset>
</div>';

		$return .= '

<div class="tl_formbody_submit">
<div class="tl_submit_container">
<button type="submit" name="preview" class="tl_submit" accesskey="p">'.$GLOBALS['TL_LANG']['tl_newsletter']['preview'].'</button>
<button type="submit" id="send" class="tl_submit" accesskey="s" onclick="return confirm(\''. str_replace("'", "\\'", $GLOBALS['TL_LANG']['tl_newsletter']['sendConfirm']) .'\')">'.$GLOBALS['TL_LANG']['tl_newsletter']['send'][0].'</button>
</div>
</div>

</form>';

		unset($_SESSION['TL_PREVIEW_MAIL_ERROR']);

		return $return;
	}
Return a form to choose an existing CSV file and import it

@param DataContainer $dc

@return string