What is the significance of the absence of an MX Record for email validation in PHP?

The absence of an MX Record for email validation in PHP means that the email address provided may not have a valid mail server associated with it. This can result in undeliverable emails. To solve this issue, you can use the getmxrr() function in PHP to check if the domain of the email address has valid MX Records. 

$email = "example@email.com";
$domain = explode('@', $email)[1];

if (getmxrr($domain, $mxhosts)) {
    echo "Valid MX Record found for $domain";
} else {
    echo "No valid MX Record found for $domain";
}

Keywords

MX Record email validation PHP DNS SMTP

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