PHP SMTP Lib

Original Repos:

• PHP SSH Lib: https://github.com/a19836/php-smtp-lib/
• Bloxtor: https://github.com/a19836/bloxtor/

Overview

PHP SMTP Lib is a PHP library that allows you to send emails reliably through SMTP servers using a simple and configurable API.
It provides full control over SMTP connections and message composition, making it suitable for transactional emails, notifications, and automated messaging.

The library supports authenticated SMTP connections, secure transport protocols, and common email features such as HTML content, plain text fallback, attachments, and custom headers.

With this library, you can:

• Send emails through any SMTP server
• Authenticate using username and password
• Use secure connections (SSL / TLS)
• Compose HTML and plain text emails
• Add attachments and inline resources
• Set custom headers, CC, BCC, and reply-to addresses
• Handle connection errors and delivery feedback

This library is ideal for applications that require full control over email delivery without relying on external APIs or third-party services.

To see a working example, open index.php on your server.

---

Usage

Simple Usage

include __DIR__ . "/lib/SmtpEmail.php";

$SmtpEmail = new SmtpEmail($smtp_host, $smtp_port, $smtp_user, $smtp_pass, "ssl");
$status = $SmtpEmail->send($from_email, $from_name, $reply_to_email, $reply_to_name, $to_email, $to_name, $subject, $message);

echo $status ? "OK" : $SmtpEmail->getErrorInfo();

Complete Usage

include __DIR__ . "/lib/SmtpEmail.php";

$validated_to_email = SmtpEmail::getEmail($to_email);

if (!$validated_to_email)
	echo "Invalid email format";
else {
	$smtp_secure = "ssl";//ssl, tls or null
	$SmtpEmail = new SmtpEmail($smtp_host, $smtp_port, $smtp_user, $smtp_pass, $smtp_secure, $smtp_encoding = 'utf-8');
	
	//Enable SMTP debugging
	//$debug:
	// 0 = off (for production use)
	// 1 = client messages
	// 2 = client and server messages
	$SmtpEmail->setDebug($debug, $output = 'echo');
	
	//prepare message
	$subject = "This is a test email with html and attachments";
	$message = '<h1>Test email</h1><p>Some info about the email:</p><ul><li>Info A</li><li>Info B</li><li>Info C</li></ul>';
	
	//prepare attachments
	$attachments = array();
	$attachments[] = array(
		"path" => $uploaded_file_1_path,
		"name" => $uploaded_file_1_name,
	);
	$attachments[] = array(
		"path" => $uploaded_file_2_path,
		"name" => $uploaded_file_2_name,
	);
	
	//send email
	$status = $validated_to_email && $SmtpEmail->send($from_email, $from_name, $reply_to_email, $reply_to_name, $validated_to_email, $to_name, $subject, $message, $attachments);

	echo $status ? "OK" : $SmtpEmail->getErrorInfo();
}