.message-signature
{
    .bbWrapper
    {
        .bbImage
        {
            max-width: 500px;
            max-height: 100px;
            overflow-x: auto;
            overflow-y: auto;
        }
    }
}

$config['maxImageResizePixelCount'] = 20000000;

.message .messageContent .messageText img {
max-width: 400px;
}

.message .messageContent .messageText img {
max-width: 400px !important;
}

.message .messageContent .messageText img {
max-width: 50%;
}