What are the potential limitations of using the mail function in PHP for sending emails with HTML content?

One potential limitation of using the mail function in PHP for sending emails with HTML content is that the HTML may not render correctly in all email clients. To ensure better compatibility, it's recommended to use a library like PHPMailer that supports sending HTML emails with proper MIME types and headers. 

<?php
require 'PHPMailer/PHPMailerAutoload.php';

$mail = new PHPMailer;

$mail->isHTML(true);
$mail->Subject = 'HTML Email Test';
$mail->Body = '<h1>Hello, this is a test email with HTML content!</h1>';

$mail->setFrom('your@email.com', 'Your Name');
$mail->addAddress('recipient@email.com', 'Recipient Name');

if(!$mail->send()) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {
    echo 'Message has been sent';
}

Keywords

mail function PHP HTML content limitations email sending

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