how to get current URL in Email message context

Hello, 

In email message, I would like to push for user an Shortcut of Linked ITEM. Like that it will be easier for user to Access to ITEM.

I know how to get ID if ITEM : I0215_CMEcu:xxxxxx

 

But how to get current URL in Email message context ?

Example : http://aras-dv4...........fr/2as/?StartItem=i0215_CMEcu:58E855AE3EDD42F59639B7FD916FDDF3