Created the email class and a logic in CakeEmail.

app/config/email.php.default

@@ -0,0 +1,58 @@
+<?php
+/**
+ * This is email configuration file.
+ *
+ * Use it to configure email transports of Cake.
+ *
+ * PHP 5
+ *
+ * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
+ * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
+ *
+ * Licensed under The MIT License
+ * Redistributions of files must retain the above copyright notice.
+ *
+ * @copyright     Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
+ * @link          http://cakephp.org CakePHP(tm) Project
+ * @package       app.config
+ * @since         CakePHP(tm) v 2.0.0
+ * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
+ */
+/**
+ * In this file you set up your database connection details.
+ *
+ * @package       cake.config
+ */
+/**
+ * Email configuration class.
+ * You can specify multiple configurations for production, development and testing.
+ *
+ * transport => The name of a supported transport; valid options are as follows:
+ *		mail 		- MySQL 4 & 5,
+ *		smtp		- Send using SMTP
+ *
+ * You can add custom database transports (or override existing transports) by adding the
+ * appropriate file to app/libs/emails.  Transports should be named 'x_transport.php',
+ * where 'x' is the name of the transport.
+ *
+ * from =>
+ * The origin email. See CakeEmail::to() about the valid values
+ *
+ */
+class EMAIL_CONFIG {
+
+	public $default = array(
+		'driver' => 'mail',
+		'from' => 'you@localhost'
+	);
+
+	public $smtp = array(
+		'driver' => 'smtp',
+		'from' => array('My Site', 'site@localhost'),
+		'host' => 'localhost',
+		'port' => 25,
+		'username' => 'user',
+		'password' => 'secret'
+	);
+
+}

lib/Cake/Network/CakeEmail.php

@@ -215,6 +215,13 @@ class CakeEmail {
  */
 	protected $_boundary = null;
 
+/**
+ * Configuration to transport
+ *
+ * @var mixed
+ */
+	protected $_config = 'default';
+
 /**
  * Constructor
  *
@@ -727,15 +734,49 @@ public function message() {
 		return $this->_message;
 	}
 
+/**
+ * Configuration to use when send email
+ *
+ * @param mixed $config String with configuration name (from email.php), array with config or null to return current config
+ * @return string
+ */
+	public function config($config = null) {
+		if (!empty($config)) {
+			if (is_array($config)) {
+				$this->_config = $config;
+			} else {
+				$this->_config = (string)$config;
+			}
+		}
+		return $this->_config;
+	}
+
 /**
  * Send an email using the specified content, template and layout
  *
  * @return boolean Success
  * @thrown SocketExpcetion
  */
 	public function send($content = null) {
+		if (is_string($this->_config)) {
+			if (!config('email')) {
+				throw new SocketException(__('%s not found.', APP . DS . 'email.php'));
+			}
+			$configs = new EMAIL_CONFIG();
+			if (!isset($configs->{$this->_config})) {
+				throw new SocketException(__('Unknown email configuration "%s".', $this->_config));
+			}
+			$config = $configs->{$this->_config};
+		} else {
+			$config = $this->_config;
+		}
+
 		if (empty($this->_from)) {
-			throw new SocketException(__('From is not specified.'));
+			if (!empty($config['from'])) {
+				$this->to($config['from']);
+			} else {
+				throw new SocketException(__('From is not specified.'));
+			}
 		}
 		if (empty($this->_to) && empty($this->_cc) && empty($this->_bcc)) {
 			throw new SocketExpcetion(__('You need specify one destination on to, cc or bcc.'));
@@ -782,7 +823,7 @@ public function send($content = null) {
 			throw new SocketException(__('The "%s" do not have send method.', $transportClassname));
 		}
 
-		$transport = new $transportClassname();
+		$transport = new $transportClassname($config);
 		return $transport->send($this);
 	}
 

lib/Cake/tests/Case/Network/CakeEmailTest.php

@@ -24,6 +24,12 @@
  */
 class TestCakeEmail extends CakeEmail {
 
+/**
+ * Config
+ *
+ */
+	protected $_config = array();
+
 /**
  * Wrap to protected method
  *