Is it possible to view an email in the client area without using the encoded url?

When I attempt to view an email in the 'My Emails' section of the client area the message is loaded using integration, so it is embedded within my WordPress website. When the page loads various elements of the page are broken and the css is screwed up. I believe this is something to do with the viewemail.php file in the root of the whmcs folder which is not editible.

So my question is would it be possible to load the email without the integration, so the url is not encoded by the WHMCS Integration plugin?

Thanks in advance, John.