Creating a new account in Mail on OSX Big Sur (11.2) and complete the required information for:
- Account type: IMAP
- Incoming mail server
- Outgoing mail server
I receive a message "Unable to verify account name or password."
Note: before you follow these steps, ensure that you know / note down all of your account passwords. This is because the saved passwords will be deleted during this process.
The steps that worked for me:
- Open the Keychain Access utility in your Applications folder
- In the Keychain Access dropdown list, open Preferences...
- Click Reset My Default Keychains and follow the prompts
- Restart your computer
You will be prompted to re-enter the passwords for all your e-mail accounts. If you were having trouble adding a new e-mail account, it should work fine now.