PHP Bounce Handler (v8)

Modern PHP 8.4+ library for parsing bounce emails, FBL reports, and autoresponses.

Package: zoonru/php-bounce-handler

Features

• Detects email type: bounce, fbl, autoresponse
• Extracts action and status (failed, transient, success, SMTP/RFC status codes)
• Resolves reason (userunknown, notaccept, filtered)
• Parses FBL fields (source IP, original sender/recipient, agent)
• Detects FBL from common patterns: report-type=feedback-report, message/feedback-report MIME parts, Feedback-ID/X-Feedback-ID, provider loop headers
• Includes fixture-driven regression tests (eml/)

Requirements

• PHP >= 8.4
• Composer

Installation

composer install

Quick Start

<?php
require_once 'vendor/autoload.php';

use Zoon\BounceHandler\BounceHandler;

$rawEmail = file_get_contents('eml/1.eml');
$handler = new BounceHandler();
$results = $handler->parse($rawEmail);

foreach ($results as $result) {
	echo $result->emailType->value . PHP_EOL;      // bounce|fbl|autoresponse
	echo $result->action->value . PHP_EOL;         // failed|transient|success|autoresponse
	echo $result->deliveryStatus . PHP_EOL;        // e.g. 5.1.1
	echo $result->recipient . PHP_EOL;
	echo $result->reason->value . PHP_EOL;
}

Development

composer lint    # psalm + phpcs
composer test    # phpunit
composer psalm
composer phpcs
composer phpcbf

Project Structure

• src/ - library source code
• tests/ - PHPUnit test suite
• eml/ - anonymized sample emails and fixtures (fixture_*) for parsing regression checks

Status

Current version is a namespaced PHP 8 rewrite with enums, readonly DTOs, static analysis, and PHPUnit coverage.