Yahoo, an early leader in Web-based e-mail, is trying to leapfrog Google with its Zimbra Desktop software, which offers online documents and offline access. Stephen Shankland Former Principal Writer ...

Windows/Mac/Linux: At the very least, the free, just-released Zimbra Desktop client gives non-paying Yahoo Mail users IMAP-style offline access to their messages. More than that, though, Zimbra adds a ...