Question

How can inline HTML be enabled for Horde Webmail?

Answer

On Webmail host, manually modify /usr/local/pem/sysvhosts/webmail/webmail/<ID>/imp/config/mime_drivers.php file by changing 'inline' value to true

In fragment

$mime_drivers['imp']['html'] = array(
    'inline' =>false,
    'handles' => array(
        'text/html'
    ),

After change, this section would be

$mime_drivers['imp']['html'] = array(
    'inline' =>true,
    'handles' => array(
        'text/html'
    ),

Internal content