html email gets stripped

[calgary]

I am trying to send an email in html format, but it doesn't stay formatted, somehow RoundCube strips the code.  When I send the email from my hotmail account it is fine, all the formating and styling is ok, but not when I send the same email from RoundCube.  Has anyone else experienced this problem and have a solution? I have gone thru the site and the forum is there a tutorial that shows how to send html emails?
TIA