Send email using WordPress

email.php

function smtp_mail( $phpmailer ) {
	// Define that we are sending with SMTP
	$phpmailer->isSMTP();
	// The hostname of the mail server
	$phpmailer->Host = YOURHOST;
	// Use SMTP authentication (true|false)
	$phpmailer->SMTPAuth = true;
	// SMTP port number normally 25
	$phpmailer->Port = '25';
	// Username to use for SMTP authentication
	$phpmailer->Username = USERNAME;
	// Password to use for SMTP authentication
	$phpmailer->Password = PASSWORD;
	$phpmailer->From = FROM;
	$phpmailer->FromName = FROMNAME;
}

add_action( 'phpmailer_init', 'smtp_mail', 10, 1 );