This works in my test.

<a href="mailto:myemail@whatever.com?subject=My Subject&Body=This is a message&cc=mail@mail.com">Mailto tag</a>

Maybe you've special characters in the message(?, & e.t.c.)?

>Thanks, but I got this to work:
>
> subject=my subject&cc=mycc@whatever.com
>
>But I couldn't get the Body parameter to work.
>
>Thanks,
>
>Jerryt
>
>
>
>>You can also use following parameters: &body=, &cc= and &bcc=
>>
>>>This is great! Is there also a message parameter?
>>>
>>>Thanks,
>>>
>>>Jerryt
>>>