Configure your Zoho Mail Account as IMAP in iPhone
Enable IMAP access in the Zoho Mail Settings page. (Login to Zoho Mail >> Settings >> POP/ IMAP and Email Forwarding >> Enable IMAP).
Tap the Mail icon in your iPhone home screen.
Tap Add account >> Other
Provide your Name, Email Address, Password and a short description. Tap Next
In the next screen, select IMAP.
In the name field, provide the name, the way you want it to appear in the outgoing emails.
In the email address specify your complete email address. If you are a domain user in Zoho Mail, provide user@yourdomain.com. Personal users can provide username@zoho.com
In the Incoming Mail Server section provide the details below.
Hostname : imap.zoho.com
Username : Your Zoho Email Address/ Username
Password : Type in your password you use for the Zoho account
In the Outgoing Mail Server section provide the details below.
Hostname : smtp.zoho.com
Username : Your Zoho Email Address/ Username
Password : Type in your password you use for the Zoho account
By default, iPhone will check the server details without SSL and give an error message. Ignore the error message and tap OK.
Tap Next and select Save to save the details provided.
To provide Advanced configuration details, Tap Settings >> Mail from your iPhone's home screen.
Tap to select the email account you created.
Scroll down and Tap "Advanced".
Under Incoming Settings select "ON" for "Use SSL"
In the Server port type in 993
Save the settings and go back to 'Account Info'
Scroll down and select "SMTP" to provide the port details there.
From the list of added SMTP Servers, select 'smtp.zoho.com'
Under Outgoing Mail Server select "ON" for "Use SSL"
Type in 465 for the Port.
Based on the updated configuration details, iPhone will check the server again. On successful login, the account will be created and emails will start syncing.
Upon successful completion, you will be navigated to Mails screen.
To configure folder settings for synchronization, select the new account and Click Advanced.
In Mailbox behaviors, map the iPhone/ iPad/ iPod folders to the folders in the Server.