We are using hosted Zimbra through 01.com on ZCS 4.5.10. (soon to be 5 this weekend) All of our users log in through the AJAX web client using Firefox. We have an Enterprise Salesforce account, and I am able to successfully configure the zimlet with my account. We have done a little bit of customizing in that we call "Accounts" "Prospects". I set up a new test prospect in the system, and then had that test person send me an e-mail. When I try to drag her e-mail over the Salesforce Zimlet, I get a "there are no matching contacts for this domain" error. However, there is. I asked the 01.com support guys, but they said the Zimlet is basically unsupported, so I am reaching out to anyone that I can help. I would be very grateful. Thanks!! Attached are screen shots.