Before setup your email account, please make sure you have below information
incoming mail server : imap.yourdomain.com
outgoing mail server : smtp.yourdomain.com
email address : username@yourdomain.com
password : *****************
Add Account
Click “Advanced setup”
Click “Internet email"
Account name: username@yourdomain.com
Your name: username@yourdomain.com
Incoming email server : imap.yourdomain.com OR imap.abchk.com
Account type: IMAP4
Email address: username@yourdomain.com
User name: username@yourdomain.com
Password: ************
Outgoing (SMTP) email server: smtp.yourdomain.com:465 OR smtp.abchk.com: 465
Select "Outgoing server requires authentication"
Select "Use the same user name and password for sending email"