Escaping the html body text ensures that mailto: specific characters will not confuse the URL handler and that your e-mail will be built with the proper headers and body.

What alternative is there to the construct to accept more than 200 characters? I seem to have bumped into the string length limit of 256 characters.quote: ...

Setting up your mailto handler is just the beginning. Read more about Firefox 3 web protocol handler possibilities. Thanks, readme!

But the Mailto: extension is really the simplest to use: click to install, then select from one of the five webmail services—Fastmail, Gmail, Hotmail/Windows Live Mail, Yahoo mail, or Zoho mail.