How can one troubleshoot and debug issues with emails not being received by recipients listed in the Cc field when using the mail function in PHP?

When using the mail function in PHP to send emails with recipients listed in the Cc field, it is important to ensure that the email addresses are correctly formatted and separated by commas. Additionally, check if the emails are not being caught by spam filters or blocked by the recipient's email server. You can also use the error handling features of the mail function to troubleshoot any issues with sending the emails.

$to = "recipient@example.com";
$subject = "Testing Cc field in PHP mail";
$message = "This is a test email with Cc recipients.";
$headers = "From: sender@example.com\r\n";
$headers .= "Cc: ccrecipient1@example.com, ccrecipient2@example.com\r\n";

if (mail($to, $subject, $message, $headers)) {
    echo "Email sent successfully";
} else {
    echo "Email sending failed";
}