I cannot send emails from my Zoho account on my iPhone 5 using the iOS email system and d on't really want to have to use the Zoho App for one email account when all others are through iOS.

I receive mails just fine and can send emails no problem from webmail.

All settings are correct as per  https://www.zoho.com/mail/help/idevice-access.html

Thank you for your help.