MacroMarket/EmailScript is a script that generates a (fairly standard) segment of JavaScript that in turn inserts an html mailto: for the specified email address.
The format is:
EmailScript(name=my.name, dom=example.com)
where my.name is the user-part of the email address and example.com is the domain. So the above example would create a JavaScript mailto: for "my.name@example.com"
Note that it matters how the lines containing script and /script are formatted.
There is no way at present to include a "user name" part of the email.