SENT mail folder not Updated for the last 7 days

SENT mail folder not Updated for the last 7 days

Hi,

I'v been using Zoho mail in my iPhone without problems for the last 7 months, but suddenly, I have a synchro problem:
When I send and email form zoho web (@belolafy.es), I cannot see it in my zoho sent mail folder in my iphone.
When I send and email form my iphone, I cannot see it in zoho web (desktop)

I have re-installed my zoho email account in my iphone three times and I always get the same problem.

I enclose photos on my setup.

I would appreciate y our help. We are really happy with the service and spreading the word, but I cannot go on in this situation.

Thanks in advance