Unable to sign in to your Yahoo! Mail account? Receiving an error message stated Invalid ID or Password? Perform the simple steps given below to get it solved. The error message Invalid ID or Password indicates that your Yahoo! Mail account credentials are not matching with the Yahoo record. To fix this Yahoo mail password not working issue,
The functioning of IMAP sync in Thunderbird during various scenarios are given here.
If you have a stable Internet connection, but the Thunderbird client is not synchronizing, perform the following steps.