How can different email clients like Hotmail and Thunderbird affect the display of links in emails sent via PHP?

Different email clients may handle links in emails differently, leading to inconsistencies in how they are displayed to recipients. To ensure uniform display across various email clients, it is recommended to use absolute URLs for links in emails sent via PHP. This means including the full URL, starting with "http://" or "https://", rather than just a relative path. 

// Example of sending an email with a link using PHP
$to = "recipient@example.com";
$subject = "Check out this link!";
$link = "https://example.com";
$message = "Click <a href='$link'>here</a> to visit our website.";

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

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

Keywords

PHP email clients Hotmail Thunderbird link display

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