What are the potential issues with sending emails using PHP, specifically in relation to headers and attachments?

Issue: One potential issue with sending emails using PHP is that incorrect headers can cause the email to be marked as spam or not be delivered properly. Additionally, attaching files to emails can be problematic if not done correctly, leading to errors or unexpected behavior. To solve these issues, make sure to set appropriate headers for the email and handle attachments properly by encoding them before sending the email. 

// Set headers
$headers = "From: sender@example.com\r\n";
$headers .= "Reply-To: sender@example.com\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: multipart/mixed; boundary=\"boundary\"\r\n";

// Encode attachment
$attachment = chunk_split(base64_encode(file_get_contents('file.txt')));

// Build email content
$message = "--boundary\r\n";
$message .= "Content-Type: text/plain; charset=\"utf-8\"\r\n";
$message .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
$message .= "This is the message body.\r\n\r\n";
$message .= "--boundary\r\n";
$message .= "Content-Type: application/octet-stream; name=\"file.txt\"\r\n";
$message .= "Content-Transfer-Encoding: base64\r\n";
$message .= "Content-Disposition: attachment\r\n\r\n";
$message .= $attachment . "\r\n";
$message .= "--boundary--";

// Send email
mail('recipient@example.com', 'Subject', $message, $headers);

Keywords

PHP email headers attachments errors

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