can I use wp_mail through an ajax call from a form?

Good Day Folks,

I have built a validation php script for my form, and I would like to send mail after validation with wp_mail. wp_mail appears to be in pluggable.php. I would like to include pluggable.php in my validator, but it doesn’t seem to work. Here is how my code is laid out:

I want to do a jquery post call to the following script, which will send my mail or return back an error. Is what I’m doing workable? I can send via mail() but not wp_mail.

wp-content/themes/mytheme/contactFormValidator.php

<?php
	include '../../wp-includes/pluggable.php';
	header('Content-Type: application/json');
	/*
	return codes:
		0: success
		1: no name
		2: no email
		3: no message
		4: server error
	*/

	//sanitizing the post variables

	$returnObj = array();
	$name = sanitize($_POST['name']);
	$email = sanitize($_POST['email']);
	$message = sanitize($_POST['message']);
	$contact = sanitize($_POST['contact']);
	$company = sanitize($_POST['company']);
	//

	if(!isset($name)){
		$returnObj["msg"] = "no name";
		$returnObj["code"] = 1;
		die(json_encode($returnObj));
	};

	if(!isset($email)){
		$returnObj["msg"] = "no email";
		$returnObj["code"] = 2;
		die(json_encode($returnObj));
	}; 

	if(!isset($message)){
		$returnObj["msg"] = "no message";
		$returnObj["code"] = 3;
		die(json_encode($returnObj));
	};

	sendEmail($returnObj, $name, $email, $message, $contact, $company);

	function sanitize($input){
		$output  = mysql_real_escape_string($input);
		$output = $input;
		if(strlen($output)==0){
			$output = NULL;
		}
		return $output;
	};

	function sendEmail($returnObj, $name, $email, $message, $contact, $company){
		$returnObj["name"] = $name;
		$returnObj["email"] = $email;
		$returnObj["message"] = $message;
		$returnObj["contact"] = $contact;
		$returnObj["company"] = $company;

		$to = "ssackler@fourthwall.ca";
		$subject = "potential sale";
		$message = "Name: ".$name." Email: ".$email." Message: ".$message;
		$sendSuccess = wp_mail($to, $subject, $message);
		if($sendSuccess){
			$returnObj["msg"] = "success";
			$returnObj["code"] = "0";
			die(json_encode($returnObj));
		}

		die("email not sent");
	};

?>