PHP/Mail

Sending email with PHP:

https://stackoverflow.com/questions/14456673/sending-email-with-php-from-an-smtp-server#14456761

Procedure:

• Open port 465
• Put PHPMailer on your PHP include path
• From the PHP script you want to send email from, include PHPMailer
• Drop in your SMTP credentials
• Now you're able to send off emails

Namecheap:

• Username: your email address
• Password: password for this email account
• Incoming/outgoing servers name: mail.privateemail.com
• Incoming server type: IMAP or POP3
• Incoming server (IMAP): 993 port for SSL
• Incoming server (POP3): 995 port for SSL
• Outgoing server (SMTP): 465 port for SSL

Installing PHPMailer

Visit PHPMailer: https://github.com/PHPMailer/PHPMailer

Copy the contents of the PHPMailer folder into one of the include_path directories specified in your PHP configuration

Opening Port

The following iptables rule will keep track of outgoing packets and will allow corresponding return packets - necessary for SMTP connections, because you want to be able to receive the "okay, data received" signal from the server you're sending mail out to.

iptables -I INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

See [1]

Using PHPMailer

<?php

//////////////////////////////////////////////////////////////
// Include PHP mailer stuff

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\Exception;

require 'path/to/PHPMailer/src/Exception.php';
require 'path/to/PHPMailer/src/PHPMailer.php';
require 'path/to/PHPMailer/src/SMTP.php';

//////////////////////////////////////////////////////////////
// Set SMTP credentials

$mail = new PHPMailer();
$mail->IsSMTP();
$mail->CharSet = 'UTF-8';

$mail->Host       = "mail.example.com"; // SMTP server example
$mail->SMTPDebug  = 0;                     // enables SMTP debug information (for testing)
$mail->SMTPAuth   = true;                  // enable SMTP authentication
$mail->Port       = 25;                    // set the SMTP port for the GMAIL server
$mail->Username   = "username"; // SMTP account username example
$mail->Password   = "password";        // SMTP account password example

?>