I am in the process of moving my business email from Yahoo to Zoho, I currently have a free account to try everything out before I go paid.  I setup several data migrations using the IMAP protocol and at first everything went well, but then after about an hour the transfer froze.  I still have plenty of storage left.  I tried the transfer several more times, and nothing is happening now.  I am now stuck halfway between email systems since I can't get the data to transfer.  Please help!  Thank you.