I have two Charter/Spectrum email accounts (domain is charter.net) set up via IMAP in Thunderbird (latest version) on Windows 11 Pro (also latest version, August 2026 CU … (read more)
I have two Charter/Spectrum email accounts (domain is charter.net) set up via IMAP in Thunderbird (latest version) on Windows 11 Pro (also latest version, August 2026 CU is installed). They no longer update; at the moment I see no email in either after 8/27/26 around 5:00pm EDT. Confirmed via Web access there are emails after this point (a couple dozen at least, in each account).
Most recently I've tried repairing the Inbox mailbox for both. No help. Because I did that, Thunderbird now shows no emails in my Inbox even though it'd had hundreds of them before.
Note, I'd noticed the same problem a week ago, had tried fixing it at that time by removing both accounts and adding them back. They worked for a few days but then stopped working again on 8/27 as noted above.
Another oddity: If I go onto synchronization settings (right-click on account name then Subscribe), it shows no folders available to subscribe to. The folder list is empty and the Refresh button is grayed out. It shows it looked up and connected to mobile.charter.net at the bottom of the dialog, so I'd expect it would have retrieved the list of IMAP folders, but apparently it got nothing. And it refuses to get anything.
I assume I can remove the accounts and add them back, but why should this be necessary every few days? Seems bizarre. Thunderbird used to work with these accounts very well but now it seems to have blown up. Who decided this is how IMAP works?