To avoid being rejected by free e-mail providers, IWI does not allow forwarding to free e-mail providers. That is why this type of email forwarding is blocked in the cPanel.
These are some of the domain names that are blocked:
We would suggest to do the forwarding of email through 3rd party email clients, Gmail perhaps or other free email provider via POP3/IMAP.
Here are the steps you can use to use email fetch using Gmail.
STEP 1. Log into your Gmail account.
STEP 2. Click the gear icon in the upper right corner of the page and select Settings.
STEP 3. Click the Accounts and Import tab and locate the Check mail from other accounts. Click Add a POP3 mail account you own link.
STEP 4. Enter the full email address of the account from which you would like mail fetched. Click Next Step.
STEP 5. Enter the username (complete email address), password of the email address you provided and your mail server (mail.yourdomain.com).
Select Port 110 for a POP3 connection.
Click the checkboxes next to the options that best suit your needs:
Leave a copy of retrieved messages on the server.
Always use a secure connection (SSL) when retrieving mail
Label incoming messages (this will show the email address you are adding in Gmail)
Archive incoming messages
Click Add Account.
STEP 6. You will be asked if you want to send emails via Google. If you choose Yes, click Next Step button and proceed to step 8.
STEP 7. If you choose No, click Finish and you are done.
STEP 8. Enter the SMTP Server (same as your mail server), username (complete email address) and password.
Select 25 for the port and unsecured connection. Click Add Account.
STEP 9. Enter your desired Name, tick the check box Treat as an alias and click Next Step.
STEP 10. An email containing the verification code and a link is sent to the email address you have added. You may either click on the link or enter the verification code. Click Verify.
And you are done! You have successfully added the email account in Gmail.
You may also refer to the following URL: https://support.google.com/mail/answer/21289?hl=en