Set correct sendmail path (Fix #10032)

libraries/joomla/mail/mail.php

@@ -557,6 +557,30 @@ public function isHtml($ishtml = true)
 		return $this;
 	}
 
+	/**
+	 * Send messages using $Sendmail.
+	 *
+	 * This overrides the parent class to remove the restriction on the executable's name containing the word "sendmail"
+	 *
+	 * @return  void
+	 *
+	 * @since   11.1
+	 */
+	public function isSendmail()
+	{
+		// Prefer the Joomla configured sendmail path and default to the configured PHP path otherwise
+		$sendmail = JFactory::getConfig()->get('sendmail', ini_get('sendmail_path'));
+
+		// And if we still don't have a path, then use the system default for Linux
+		if (empty($sendmail))
+		{
+			$sendmail = '/usr/sbin/sendmail';
+		}
+
+		$this->Sendmail = $sendmail;
+		$this->Mailer   = 'sendmail';
+	}
+
 	/**
 	 * Use sendmail for sending the email
 	 *