I would think it would work like this:
<a href="http://127.0.0.1:43110/Mail.ZeroNetwork.bit/#mailto:soandso@zeroid.bit&Subject=Hello%20World">Say hello to soandso</a>
And then on ZeroMail page load do all the string magic to location.hash to extract it.
I already see people say "Send me a ZeroMail" but then you have to manually enter their email address and copy and paste it.
I am thinking of something like this: http://www.w3schools.com/tags/tryit.asp?filename=tryhtml_link_mailto
I would think it would work like this:
<a href="http://127.0.0.1:43110/Mail.ZeroNetwork.bit/#mailto:soandso@zeroid.bit&Subject=Hello%20World">Say hello to soandso</a>
And then on ZeroMail page load do all the string magic to location.hash to extract it.