Max length is 1536.
The only thing you can do is optimize the HTML code, but in your case i see its already done.
You can remove some unnecessary code like:
PHP Code:
<hr*size=1*color=blue></font><b><font*size=2>Desenvolvido*por:*MonSter*'|RUCA|*<3**--*WarGame-CM</b>
and
PHP Code:
<head><META*http-equiv=Content-Type*content='text/html*;charset=UTF-8'>
I think ARIAL is the default font, so:
PHP Code:
font-family:Arial
is not needed.
The image URL's can be shorten to save some characters, use this:
https://goo.gl/
I also suggest you do Top10 instead of Top15.