It’s impressive to be able to give away 31.2 million free Gmail accounts, as Google has. It’s even more impressive to get customers to pay for 40 million mailboxes, as Zimbra reported today, representing a sharp spike from the 20 million paid mailboxes reported in early 2009. The secret to Zimbra’s success? Innovation and integration,Continue reading “Zimbra tops Google’s Gmail with 40 million paid mailboxes”