Problems with zoho desk

Problems with zoho desk

Good morning

This email is to tell you if you can help us, because we have  been having problems with zoho desk.
The emails have been arriving in mail clients but not in our zoho desk, we thought maybe if our configuration of our emails could be wrong but actually not, we already check the configuration and everything is okay, 
What can we do for resolve the problem? We will be waiting your answer.
Regards