Are there any best practices or guidelines for setting the sender and priority in emails sent through PHP using the "mail()" function?

When sending emails through PHP using the "mail()" function, it is important to set the sender and priority correctly to ensure proper delivery and handling by email clients. To set the sender, you should use the "additional_headers" parameter in the "mail()" function with the "From" header. To set the priority, you can use the "X-Priority" header in the additional headers. 

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

$headers = "From: sender@example.com\r\n";
$headers .= "X-Priority: 1\r\n"; // Set priority to highest

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

Keywords

PHP mail() email sender email priority guidelines

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