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Yahoo IMAP account fails to load INBOX, error message as follows:

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  • Paskiausią atsakymą parašė christ1

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The current operation on "inbox" did not succeed. The mail server for account XXX@yahoo.com responded:

|CLIENTBUG| SELECT Command is not valid in this state.

• I have already deleted and re-added the account several times. Prior to re-adding it this last time, The error message read exactly the same except instead of "client bug' it just said " Command is not valid in the state"

• everything was working fine from the same computer and the same account for years. • I have already checked and triple checked all settings, and even used the manual configuration settings to no avail. • This problem appeared about a week or two ago

The current operation on "inbox" did not succeed. The mail server for account XXX@yahoo.com responded: |CLIENTBUG| SELECT Command is not valid in this state. • I have already deleted and re-added the account several times. Prior to re-adding it this last time, The error message read exactly the same except instead of "client bug' it just said " Command is not valid in the state" • everything was working fine from the same computer and the same account for years. • I have already checked and triple checked all settings, and even used the manual configuration settings to no avail. • This problem appeared about a week or two ago

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Join the crowed. https://forums.yahoo.net/t5/Account-security/CLIENTBUG-SELECT-command-is-not-valid-in-this-state/td-p/300162

If you're lucky, things will start working again eventually at some point. In any case, complain to Yahoo.