Sample PHPMailer Script with Gmail Settings

mail.php

<?php
function sendMailerMail($recipient, $subject, $email_content)
{
    // include phpmailer class and initialize
    require_once __dir__ . 'class.phpmailer.php';
    $mail = new PHPMailer();
    // //

    // set up mail server settings
    // sample for gmail
    $mail->IsSMTP();
    $mail->SMTPAuth = true;
    $mail->Host     = "smtp.gmail.com";
    $mail->Port     = 587;
    $mail->SMTPSecure = "tls";
    // //

    // set up sender and receiver
    $mail->Username = "sender@gmail.com";
    $mail->Password = "password";
    $mail->SetFrom($from, "Sender Name");
    $mail->FromName = 'Sender Name';
    $mail->AddAddress($recipient);
    // //

    // set up mail
    $mail->IsHTML(true);
    $mail->CharSet  = 'UTF-8';
    $mail->Subject = $subject;
    $mail->Body    = $email_content;
    // //

    if($mail->Send()) {
        // mail sent
        return true;
    } else {
        // see what the error is
        echo $mail->ErrorInfo;
        return false;
    }
}