Are there any best practices for including images in HTML emails sent through PHP?

When including images in HTML emails sent through PHP, it's important to use absolute URLs for the image sources to ensure they display correctly across different email clients. Additionally, it's recommended to host the images on a secure server to prevent any security risks. Finally, consider using inline CSS to style the images for better compatibility. 

<?php
$to = "recipient@example.com";
$subject = "HTML Email with Image";
$message = '
<html>
<head>
<style>
img {
    max-width: 100%;
    height: auto;
}
</style>
</head>
<body>
<p>This is an HTML email with an image:</p>
<img src="https://www.example.com/image.jpg" alt="Image">
</body>
</html>
';

$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";
$headers .= 'From: Your Name <yourname@example.com>' . "\r\n";

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

Keywords

HTML emails images PHP embedding MIME types

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