How can one troubleshoot and resolve unusual header behavior in PHP emails?

Issue: Unusual header behavior in PHP emails can be caused by incorrect header formatting or conflicting headers. To troubleshoot and resolve this issue, ensure that headers are properly formatted and avoid using conflicting headers. 

// Fixing unusual header behavior in PHP emails
$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";

// Additional headers
$headers .= "From: sender@example.com" . "\r\n";
$headers .= "Reply-To: reply@example.com" . "\r\n";

// Send email
$to = "recipient@example.com";
$subject = "Test Email";
$message = "This is a test email.";

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

Keywords

PHP email headers troubleshooting resolve unusual behavior

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