What are common issues when trying to send emails using PHP's mail function?

Common issues when trying to send emails using PHP's mail function include emails being marked as spam, emails not being delivered at all, or incorrect formatting of the email message. To solve these issues, ensure that the email headers are set correctly, the email content is properly formatted, and the email server settings are configured properly. 

// Set the email headers to prevent emails from being marked as spam
$headers = 'From: your_email@example.com' . "\r\n" .
    'Reply-To: your_email@example.com' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();

// Format the email message properly
$message = wordwrap($message, 70, "\r\n");

// Send the email using the mail function
mail($to, $subject, $message, $headers);

Keywords

SMTP mail function spam folder authentication error handling

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