Magento: Fix Sendfriend Mail Sender. You can't send mails from your server with eg. gmail.com as sender mail address!

Magento Fix Sendfriend Mail Sender

<?php
/**
 * Mds_MagentoExtender_Model_Sendfriend_Sendfriend for our extension. Use your own name.
 */
class Mds_MagentoExtender_Model_Sendfriend_Sendfriend extends Mage_Sendfriend_Model_Sendfriend {

	public function send()
	{
		if ($this->isExceedLimit()){
			Mage::throwException(Mage::helper('sendfriend')->__('You have exceeded limit of %d sends in an hour', $this->getMaxSendsToFriend()));
		}

		/* @var $translate Mage_Core_Model_Translate */
		$translate = Mage::getSingleton('core/translate');
		$translate->setTranslateInline(false);

		/* @var $mailTemplate Mage_Core_Model_Email_Template */
		$mailTemplate = Mage::getModel('core/email_template');

		$message = nl2br(htmlspecialchars($this->getSender()->getMessage()));
		/*$sender  = array(
			'name'  => $this->_getHelper()->escapeHtml($this->getSender()->getName()),
			'email' => $this->_getHelper()->escapeHtml($this->getSender()->getEmail())
		);*/
		$sender = 'general';

		$mailTemplate->setDesignConfig(array(
				'area'  => 'frontend',
				'store' => Mage::app()->getStore()->getId()
			));

		foreach ($this->getRecipients()->getEmails() as $k => $email) {
			$name = $this->getRecipients()->getNames($k);
			$mailTemplate
				->setReplyTo($this->_getHelper()->escapeHtml($this->getSender()->getEmail()))
				->sendTransactional(
				$this->getTemplate(),
				$sender,
				$email,
				$name,
				array(
					'name'          => $name,
					'email'         => $email,
					'product_name'  => $this->getProduct()->getName(),
					'product_url'   => $this->getProduct()->getUrlInStore(),
					'message'       => $message,
					'sender_name'   => $this->_getHelper()->escapeHtml($this->getSender()->getName()),
					'sender_email'  => $this->_getHelper()->escapeHtml($this->getSender()->getEmail()),
					'product_image' => Mage::helper('catalog/image')->init($this->getProduct(),'small_image')->resize(75),
				)
			);
		}

		$translate->setTranslateInline(true);
		$this->_incrementSentCount();

		return $this;
	}

}