I do not know the answer to your question.
It would involve a server and html email with the code to make it happen.
There are services that send fancy email with links to unsubscribe and share with friends.
I have been using www.madmimi.com.
It allows a hundred addressees for free. Meaning you can send as many emails you want, but it is limited to 100 people.
The cost for 5000 is minimal.
A few of the other fancy email services