Is it possible to change my Mail Lite subscription to a free mail account and keep all the data?

During the last year I have tried (with your help-thanks for that) to use the wanted paid fucntionallity (access my iCloud-account through IMAP). I did not get it to work for longer as a day or two and found another way to get access to that account. 

So I do not need the paid subscription anymore but would most certainly keep access to my mail on Zoho. 

Is that possible and how do I achieve this?