In the US, there is (or used to be) a show on Comedy Central TV network called "Crank Yankers", in which puppets would make prank phone calls. One of the skits involved an old man who just got his first computer and AOL. The old man is on the phone with some computer tech person, and he keeps saying, "I've got mail! I've got mail! I've got mail, yaaayyyyy!". Repeat add nausia.
This relates to the content of the thread in no way whatsoever, I was just in a goofy mood.
Or if you prefer that there be some connection, "I've got mail" rhymes with "Let's go sail", and as we all know, a sail is made from fabric. Fabric softener smells good, and the adjective "good" is what you might use to describe the change to the drop-down list-box. And there you have it.