Email sent from IPhone IMAP doesn't sync to zoho.com sent folder???

Email sent from IPhone IMAP doesn't sync to zoho.com sent folder???

I am really confused...PLEASE HELP!

My domain email is all setup in zoho & send/receives just fine on zoho.com. I set it up on my IPhone using IMAP & it receives just fine. It sends mail out as my domain name email fine too, but sent mail doesn't show up anywhere on my IPhone sent folder nor does it show up on zoho.com sent folder. I need to be able to have copy of the sent message on my phone & on zoho.com. What am I doing wrong?

I have tried everything, Please help me figure this out!

Thank You!!!!!