At least in the IMAP case, we're correctly [setting the failed security info on the URL](https://searchfox.org/comm-central/rev/51789ee8372d99b81330c82b65e28569048623f0/mailnews/imap/src/nsImapProtocol.cpp#4836) for URL listeners to pick up later, but there are no listeners.
Bug 1893899 Comment 1 Edit History
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At least in the IMAP case, we're correctly [setting the failed security info on the URL](https://searchfox.org/comm-central/rev/51789ee8372d99b81330c82b65e28569048623f0/mailnews/imap/src/nsImapProtocol.cpp#4836) for URL listeners to pick up later, but there are no listeners. (Edit: There is a listener, but it's just the folder being updated. Which helps nobody.)