Is there a simple way to add the current domain path to IMG src locations in a HTML version of an email template without putting the full URL as it will change between development and live.

e.g.

<img  src="{%SOMEVARIABLE%}/App_Themes/Site/assets/images/email/image.gif" width=”x” height=”x” />

Can I use CMSContext.GetCurrentSite().DomainName?

I need this for - custom forgot password email and register.

Thanks