What are common issues when sending emails with HTML content to different email providers in PHP?

Common issues when sending emails with HTML content to different email providers in PHP include inconsistent rendering of HTML elements, missing images or styles, and emails being marked as spam. To solve these issues, it's important to test emails across different email providers, use inline CSS styles, and host images on a reliable server. 

// Example code snippet to send HTML email with inline CSS styles and hosted images

$to = 'recipient@example.com';
$subject = 'HTML Email Test';

$headers = "MIME-Version: 1.0" . "\r\n";
$headers .= "Content-type:text/html;charset=UTF-8" . "\r\n";

$message = '
<html>
<head>
<style>
  h1 { color: #333; }
</style>
</head>
<body>
<h1>This is a test HTML email</h1>
<img src="https://example.com/image.jpg" alt="Image">
</body>
</html>
';

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

Keywords

PHP email HTML content email providers compatibility

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