Validate Email Domain Php Official

// Connect to SMTP server $connection = @fsockopen($mx_host, 25, $errno, $errstr, 10);

return false;

if (!empty($records)) return true;

function validateDomainWithDns($email) $domain = substr(strrchr($email, "@"), 1); // Use dns_get_record as alternative $records = dns_get_record($domain, DNS_MX);

// Cache validation results to avoid repeated DNS lookups function cachedDomainValidation($email) checkdnsrr($domain, "A"); $cache[$domain] = $result; validate email domain php

fclose($connection);

function comprehensiveEmailValidation($email) // Remove any whitespace $email = trim($email); // Validate format if (!filter_var($email, FILTER_VALIDATE_EMAIL)) return ["valid" => false, "reason" => "Invalid email format"]; // Connect to SMTP server $connection = @fsockopen($mx_host,

// Optional: Check for disposable email domains $disposableDomains = ['tempmail.com', 'throwaway.com', 'guerrillamail.com']; if (in_array($domain, $disposableDomains)) return ["valid" => false, "reason" => "Disposable email domain not allowed"];