What are the best practices for handling incorrect email addresses in PHP mail functions?

When handling incorrect email addresses in PHP mail functions, it is important to validate the email address before attempting to send an email. This can be done using PHP's built-in filter_var function with the FILTER_VALIDATE_EMAIL filter. If the email address is invalid, you can handle the error gracefully by displaying an error message to the user or logging the issue for further investigation. 

$email = "invalid_email@example";
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    echo "Invalid email address";
} else {
    // Proceed with sending the email
    // mail($email, $subject, $message);
}

Keywords

email validation error handling PHP mail function SMTP bounce handling

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