Customize column "who" in Inbox

I want to customize the “who” column of Inbox to display full email address instead of only the common name. I use Domino Designer to edit the “who” column formula. No matter how I change the formula, it still return the default common name of the sender. Problem persist even for the following simple formula:

test := “my address”;
test;

However, if I just put a string, for example “my address” in the formula, then the “who” column of the Inbox became “my address”.

Grateful if any one can help.