Get invalid recipient's emails from mailgun

exec

php logs.php > logs.txt

logs.php

<?php
//Set your domain and api key

function fetch_failed_mails($url = "https://api.mailgun.net/v3/domain.com/events?event=failed&limit=300") {
	$ch = curl_init(); 
	curl_setopt($ch, CURLOPT_URL, $url); 
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
	curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);	
	curl_setopt($ch, CURLOPT_USERPWD, "your-api-key-here"); 
	curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
	$ch_output = curl_exec($ch); 
	curl_close($ch);
	$decoded = (array) json_decode($ch_output);
	return $decoded;
}
$decoded = fetch_failed_mails();
$output = $decoded['items']; 	
while(isset($decoded['paging']->next) && !empty($decoded['paging']->next)) {
	$decoded = fetch_failed_mails($decoded['paging']->next.'?limit=300');
	if(isset($decoded['items']))
		$output = array_merge($output, $decoded['items']);
	else 
		break;
}

foreach($output as $email) {
	echo $email->recipient."\n";
}