Actually I'd have liked the e-mail icon, so don't have to stop the aquarium every so often to see if you have e-mail, oh well...
One way to achieve the same thing is to use something like the freeware Jet Mail Monitor. You can download a copy from:
http://www.brothersoft.com/jetmailmonitor-68107.html
I haven't personally used it in some time but I ran an older version of it for a couple of years. You can set it to check multiple email accounts and notify you of new emails in a variety of ways including playing a user selectable sound file.