Mail is not allowing my Coldwell Banker mail to be forwarded.

Hi there Eemamimi,

If you are unable to forward messages in the Mail app on your Mac, did you test if this occurs in webmail as well? This will help isolate the cause of this issue. The 'Test using webmail' section of this article (that you've already looked over) walks you through how to do this: If you can’t send or receive email on your Mac

If this only occurs in the Mail app, use these steps from that article next since they can resolve what's happening:

Remove your email account, then add it back

If no other solutions work, follow these steps:

1. Remove your email account in Mail.

2. Add your email account in Mail again. When adding the account, make sure that you choose the correct email service provider for your email address.

3. Try to send and receive email.

We hope that helps!

Can you forward the emails on other devices? Is your device provided by your organization?