Add Email to iPhone & iPad
Go to Settings
Go to Password & Accounts
Go to Add Account
Go to Other
Go to Add Mail Account
Name : Your Name (English Only)
Email : youremail@yourdomain.com
Password : ******* (Your Password)
Description : Description
After that, Click Next
Selected IMAP
Incoming Mail Server
Host Name: imap.yourdomain.com
Username: youremail@yourdomain.com , Password: ****** (Your Password)
Outgoing Mail Server
Host Name: smtp.yourdomain.com
Username: youremail@yourdomain.com , Password: ****** (Your Password)
POPUP: Cannot Verify Server Identity
Click Continue
POPUP: Cannot Verify Server Identity again
Click Continue
After that, Click Save
Turn off SSL (Important)
Go to your Email Account
Click SMTP
Turn off SSL, After that Click Done
After that, Click < Account
Go to Advanced
Turn off SSL, After that click < Account
Click Done