What are common pitfalls when setting up a mail server like Uebimiau in PHP development?

Common pitfalls when setting up a mail server like Uebimiau in PHP development include not properly configuring the SMTP settings, not handling errors or exceptions when sending emails, and not sanitizing user input before using it in the email message. To solve these issues, make sure to double-check the SMTP settings, use try-catch blocks to handle errors when sending emails, and always sanitize user input using functions like htmlspecialchars().

// Example of properly configuring SMTP settings
ini_set('SMTP', 'your_smtp_server');
ini_set('smtp_port', 'your_smtp_port');

// Example of using try-catch block to handle errors when sending emails
try {
    // code to send email
} catch (Exception $e) {
    echo 'Message could not be sent. Error: ' . $e->getMessage();
}

// Example of sanitizing user input before using it in the email message
$user_input = $_POST['user_input'];
$clean_input = htmlspecialchars($user_input);