(To me) your question isn't clear enough.
Code:
I have created a HTML template for sending emails to the clients. I read the values from the database and fills them in the template.
Now i want to read the contents of this HTML template.
What values are you reading? (Address book or Zimbra users?)
It seems to me that this is more of a programming related question than Zimbra related.
If not, please explain.
Chintan.