Set a mailto link with a subject containing an ampersand (&)

Im using the following mailto link to send an email:

 <a class="share3" title="" href="mailto:?subject=@check&amp;body=@domain">

It works well, but sometimes my subject will contain an ampersand (&) character, and when it does my email is created without a body.

Any way to resolve this problem?

Solution

In order to get special/reserved characters into a URL, you must encode them - to get an & to work, it must be encoded to %26.