Make hyperlink in webmail back to mvc4 project

Make hyperlink in webmail back to mvc4 project

I have a webmail and i want the user to press on a picture in the webmail
and then be linked back to my mvc project view. I don't have a real domain
yet so i can't type www.mysite.com. I want to be able to link to the view
without depending on which domain the site is currently running on.
in my webmail i have the body that looks like this:
string Body = "<b>Välj ett alternativ!</b><br><br><a
href='cid:path4'/><img src='cid:Happy'/ alt='HTML tutorial' width='120'
height='120'></a><input type='image' src='cid:Orange'/ name='image'
width='120' height='120'><input type='image' src='cid:Mad'/ name='image'
width='120' height='120'>";
where the cid:path4 is i want the url och what ever so that i linkes me
back to my project.