I've followed this tutorial  https://blogs.zoho.com/general/accessing-zoho-mail-on-iphone-ipad-through-imap and after several tries, I couldn't figure out how to connect my phone to the Zoho servers. 

Zoho hosts my company's e-mail which works fine in my pc, however, when I try to connect my phone, even using the same addresses used on Outlook, it just doesn't pass from the 'Verifying' step, it says the sever is not answering. 

Am I missing something?

Thanks for the help,

Guilherme Cenzi