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I want Thunderbird to download all emails automatically, as soon as as it opens. I use to to back up a Gmail account, by scheduling it to open, download everything, and close, periodically.

As mentioned, I use Gmail, using the standard set-up in Thunderbird. It defaults to using OAuth and it works fine. The only sub-folders are the ones from Gmail, including a few tags I set up via the web interface.

The mails appear in the folder when I click on it, but their content is not downloaded to offline storage. It seems to refresh headers when I click on the folder. The not downloaded ones seem to be more recent, but perhaps not the very most recent ones.

For some reason when I open Thunderbird it doesn't download all emails, despite my settings. I have tried:

  • mail.check_all_imap_folders_for_new set to true
  • mail.server.default.check_all_folders_for_new set to true
  • "Keep all messages for this account on this computer" ticked
  • "Synchronize all messages regardless of age" selected
  • In the Advanced menu for synchronizing, all folders are ticked
  • "Check for new messages at startup" ticked
  • In Folder Properties -> "When getting new messages for this account, always check this folder" ticked
  • In Folder Properties -> "Select this folder for offline use" ticked

If I manually click "Get Messages" it does download the messages.

I have Thunderbird 102.14.0 (64-bit). It is the portable version on Windows 10.

I have checked the following questions, but none of them offer any ideas I have not already tried:

user3241
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  • You should enhance your question by more details. At the first glance I miss (1) Do you use IMAP or POP3? (2) Do you maintain a sub-folder structure? (3) Which type of mails are missing? New noes or old ones? (4) By "*doesn't download everything"*, do you mean *"These mails are not listed."* OR *"The mail content hasn't been fetched, but you see it in the list"*? (5) How does this *"Open to download ... close"* look like? How is the scheduling done? (6) Surely there is more that would be good to know. – dodrg Aug 18 '23 at 14:49
  • As explained in the question, I use Gmail via the built in support and default OAuth. I will add other details. – user3241 Aug 18 '23 at 16:29

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