How can I get the current domain alias for the current site?

how to get the current site url in the email template like@a href=@{%RootDocument.AbsoluteURL#%}alumni/View-Campaign?m={%view%}@@Please click on the link@/a@ i need to send the url to the user fo...

Can anyone suggest where did CMSContext.CurrentSiteName go in Kentico 8? Thanks a lot.