How can one ensure that the sender is mentioned in the mail header when sending emails with PHP?

To ensure that the sender is mentioned in the mail header when sending emails with PHP, you can use the `additional_headers` parameter in the `mail()` function to specify the sender's email address. This can be done by adding a "From" header in the additional headers. 

$to = "recipient@example.com";
$subject = "Subject of the email";
$message = "This is the message content";

$headers = "From: sender@example.com\r\n";

mail($to, $subject, $message, $headers);

Keywords

PHP email sender header mail function

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