Fake "Email Quota" message is a phisher scam
Many Caltech email users received a message today with the subject line "Email Quota" and a message stating that the user is over quota and must "click on your email below to restore access". These messages are fakes and the fraudulent site they link to is blocked from campus. It is always a good practice to examine a link received in email to see where it goes. Most mail clients will let you do this if you mouse over, but don't actually click, on the link. On a mobile device, press-and-hold will typically also display where a link goes.