I have been with this problem for several months and to date I have no solution from the Zoho support team, the issue is specific I have been able to sort my emails sent by folders and subfolders through filters, what I cannot is "SORT EMAILS FROM THIS SUBFOLDER BY RECIPIENT "(It is not valid to activate the conversation mode in this subfolder, because it is probable that some recipients do not respond to me and it is not the way we work either).

prompt response.