How to send Email in magento

Use following code
<?php
$mail = Mage::getModel('core/email');
$mail->setToName('Your Name');
$mail->setToEmail('Youe Email');
$mail->setBody('Mail Text / Mail Content');
$mail->setSubject('Mail Subject');
$mail->setFromEmail('Sender Mail Id');
$mail->setFromName("Msg to Show on Subject");
$mail->setType('html');// YOu can use Html or text as Mail format

try {
$mail->send();
Mage::getSingleton('core/session')->addSuccess('Your request has been sent');
$this->_redirect('');
}
catch (Exception $e) {
Mage::getSingleton('core/session')->addError('Unable to send.');
$this->_redirect('');
}
?>


To send mail with attached file, prefer use of Zend_Mail

try{
            $mail = new Zend_Mail();
            $mail->setFrom("fromemail","fromname");
            $mail->addTo("toemail","toname");
            $mail->setSubject("subject");
            $mail->setBodyHtml(" body text"); // here u also use setBodyText options.

            // this is for to set the file format
            $at = new Zend_Mime_Part($content);

            $at->type        = 'application/csv'; // if u have PDF then it would like -> 'application/pdf'
            $at->disposition = Zend_Mime::DISPOSITION_INLINE;
            $at->encoding    = Zend_Mime::ENCODING_8BIT;
            $at->filename    = $filename;
            $mail->addAttachment($at);
            $mail->send();

        }catch(Exception $e)
        {
            echo $e->getMassage();

        }