// SMTP conversation fputs($connection, "HELO yourdomain.com\r\n"); $response = fgets($connection, 1024);
function validateEmailFormat($email) return filter_var($email, FILTER_VALIDATE_EMAIL) !== false; validate email domain php
fclose($connection);
function validateDomainWithDns($email) $domain = substr(strrchr($email, "@"), 1); // Use dns_get_record as alternative $records = dns_get_record($domain, DNS_MX); // SMTP conversation fputs($connection, "HELO yourdomain