Made the code more readable, updated the changelog.
diff --git a/system/libraries/Email.php b/system/libraries/Email.php
index 39a7059..8d839d0 100644
--- a/system/libraries/Email.php
+++ b/system/libraries/Email.php
@@ -1434,7 +1434,7 @@
 			return FALSE;
 		}
 
-		if ( !($this->_smtp_connect() && $this->_smtp_authenticate()) )
+		if ( ! $this->_smtp_connect() OR ! $this->_smtp_authenticate())
 		{
 			return FALSE;
 		}