I am having trouble connecting to the Yahoo IMAP server to index the contents of a Yahoo mailbox.
Explanation:
Yahoo has introduced a new feature called App Passwords, which is necessary for connecting third-party applications to Yahoo mailboxes. However, Yahoo has recently acknowledged that this feature is not currently functioning. As a result, it's no longer possible to connect to a Yahoo mailbox via Intella, as per Yahoo's official Reddit group and support portal.
Workaround:
If you need to index Yahoo mailbox contents, your best option is to use the Yahoo Mail App or website to create a PST file that can be ingested using Intella. Instructions on creating a PST file can be found in the Yahoo Knowledge Base, both for the web application and the app.