Folders not syncing
Hi All, I have been sending emails through Android Thunderbird, but they aren't being synced to the server, so I can't see them anywhere else. I've set the Sent folder to sync (as well as the Inbox). Pressing the sync button just spins the indicator, but doesn't actually sync. When I try to move or copy messages, an error comes up saying that messages can't be copied or moved that aren't synconised. How can all my messages (sent, inbox, everything) be synced so that I can see them everywhere? I've just turned on sync debugging, will see the results soon.
All Replies (6)
Hi Firefox1748
Please see the link below that guides you on collecting and providing debug logs. The logs are accessed from settings > general settings > debugging.
What version of Thunderbird for Android and email provider you are using? Does your email provider use imap namespace prefixes by any chance?
App Version 12.1 webmail.au.syrahost.com IMAP, yes - Unsure about namespace prefixes(?) . Works ok for Windows Thunderbird...
Not sure how to attach the log file for analysis.
Okulungisiwe ngu firefox1748
Not sure if this forum facilitates uploading files other than images.
Can you try the following and advise if sync then works.
Navigate to settings > account > fetching mail > incoming server.
- Untick Auto-detect Imap namespace
- Clear any text in the Imap prefix box
Short of uploading the log file, can you open it in a text editor and search for presence of inbox.inbox Please confirm if it's found.
This will help rule out the below bug v12.1 as a factor. https://github.com/thunderbird/thunderbird-android/issues/9567
Thanks Platform34, I've un-ticked the auto-detect, the text box was empty. Here's a section of the diagnostics log:
10-17 19:10:27.696 10468 10499 I MessagingController: Running command 'syncINBOX.Sent', seq = 94 (background priority) 10-17 19:10:27.700 10468 10499 I ImapSync: Synchronizing folder Personal:INBOX.Sent 10-17 19:10:27.797 10468 10499 E RealImapFolder: Unable to open connection for 9c5794ff-c5ad-409a-82a1-8c2ff1db6c7b:INBOX.Sent/MessagingController/conn62974263 10-17 19:10:27.797 10468 10499 E RealImapFolder: com.fsck.k9.mail.store.imap.NegativeImapResponseException: Command: EXAMINE "INBOX.INBOX.Sent"; response: #45# [NO, Mailbox doesn't exist: INBOX.INBOX.Sent (0.001 + 0.000 secs).] 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.mail.store.imap.ImapResponseParser.readStatusResponse(ImapResponseParser.java:127) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.mail.store.imap.RealImapConnection.executeSimpleCommand(RealImapConnection.kt:747) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.mail.store.imap.RealImapConnection.executeSimpleCommand(RealImapConnection.kt:733) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.mail.store.imap.RealImapFolder.executeSimpleCommand(RealImapFolder.kt:106) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.mail.store.imap.RealImapFolder.internalOpen(RealImapFolder.kt:146) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.mail.store.imap.RealImapFolder.open(RealImapFolder.kt:117) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.backend.imap.ImapSync.synchronizeMailboxSynchronous(ImapSync.kt:84) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.backend.imap.ImapSync.sync(ImapSync.kt:34) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.backend.imap.ImapBackend.sync(ImapBackend.kt:56) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController.syncFolder(MessagingController.java:658) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController.synchronizeMailboxSynchronous(MessagingController.java:596) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController.synchronizeFolderInBackground(MessagingController.java:2437) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController.$r8$lambda$u9y9ejCYmW7WFdXKvuRwKKaRb94(MessagingController.java:2409) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController$$ExternalSyntheticLambda34.run(R8$$SyntheticClass:0) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController.runInBackground(MessagingController.java:239) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController.-$$Nest$mrunInBackground(MessagingController.java:0) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at com.fsck.k9.controller.MessagingController$1.run(MessagingController.java:179) 10-17 19:10:27.797 10468 10499 E RealImapFolder: at java.lang.Thread.run(Thread.java:1119) 10-17 19:10:27.798 10468 10499 E ImapSync: synchronizeMailbox 10-17 19:10:27.798 10468 10499 E ImapSync: com.fsck.k9.mail.store.imap.NegativeImapResponseException: Command: EXAMINE "INBOX.INBOX.Sent"; response: #45# [NO, Mailbox doesn't exist: INBOX.INBOX.Sent (0.001 + 0.000 secs).] 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.mail.store.imap.ImapResponseParser.readStatusResponse(ImapResponseParser.java:127) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.mail.store.imap.RealImapConnection.executeSimpleCommand(RealImapConnection.kt:747) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.mail.store.imap.RealImapConnection.executeSimpleCommand(RealImapConnection.kt:733) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.mail.store.imap.RealImapFolder.executeSimpleCommand(RealImapFolder.kt:106) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.mail.store.imap.RealImapFolder.internalOpen(RealImapFolder.kt:146) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.mail.store.imap.RealImapFolder.open(RealImapFolder.kt:117) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.backend.imap.ImapSync.synchronizeMailboxSynchronous(ImapSync.kt:84) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.backend.imap.ImapSync.sync(ImapSync.kt:34) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.backend.imap.ImapBackend.sync(ImapBackend.kt:56) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController.syncFolder(MessagingController.java:658) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController.synchronizeMailboxSynchronous(MessagingController.java:596) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController.synchronizeFolderInBackground(MessagingController.java:2437) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController.$r8$lambda$u9y9ejCYmW7WFdXKvuRwKKaRb94(MessagingController.java:2409) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController$$ExternalSyntheticLambda34.run(R8$$SyntheticClass:0) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController.runInBackground(MessagingController.java:239) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController.-$$Nest$mrunInBackground(MessagingController.java:0) 10-17 19:10:27.798 10468 10499 E ImapSync: at com.fsck.k9.controller.MessagingController$1.run(MessagingController.java:179) 10-17 19:10:27.798 10468 10499 E ImapSync: at java.lang.Thread.run(Thread.java:1119) 10-17 19:10:27.804 10468 10499 E ImapSync: Failed synchronizing folder Personal:INBOX.Sent @ Fri Oct 17 19:10:27 AEDT 2025 10-17 19:10:27.807 10468 10499 I MessagingController: Command 'syncINBOX.Sent' completed
It does seem to be the same issue. Any fix yet? Should I re-tick the auto detect??
Hi Firefox1748
Thanks for supplying the log extract. It confirms you're experiencing the bug I referenced.
Command: EXAMINE "INBOX.INBOX.Sent"; response: #45# [NO, Mailbox doesn't exist: INBOX.INBOX.Sent
I'd recommend leaving "auto-detect imap namespace" unticked until you upgrade the app. Please also check the special folders such as Draft, Sent, trash etc are still mapped correctly under ..
- Settings > Account > Folders.
K-9 version 13 was released yesterday on github .
It fixes the issue. You'll need to obtain the update from the same source as your existing install to upgrade it. It's be a few days before it's available on the F-Droid store.
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