Set pop mailbox to import all mail (historic as well as new) for use with Zoho CRM

Set pop mailbox to import all mail (historic as well as new) for use with Zoho CRM

Hi, I'm trying to use the CRM functionality, which looks awesome, but when I wet up the pop mailbox in Zoho, it doesn't import mail before the date I set it up, which means I have no record of historic correspondence to make available to the CRM tool. This makes it no use to me. What can I do?