This article was written for Thunderbird but also applies to Mozilla Suite / Sea Monkey (though some menu sequences may differ).
It hasn't been updated for Thunderbird 3 yet, which adds support for a different type of offline folder in Tools - Synchronization & Storage Thunderbird normally downloads just the headers for messages in a IMAP account.
When a mailbox seems off in Mozilla Thunderbird and missing messages, for example, a repair can often help.
Your Mozilla Thunderbird inbox is suddenly much lighter, and you can't claim any credit?
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It causes Thunderbird to explicitly select each folder to update the message summaries, rather than using the STATUS command.But you can configure Thunderbird to automatically check for new messages in other folders.There are two ways to do this but adding more folders may affect Thunderbird and/or server performance: If you are the admin for the IMAP server you may be able to configure it to check for new mail in all folders and notify the email client using the IDLE command.You've deleted a message weeks ago, you're certain, and it still shows up in a folder?Sometimes, Mozilla Thunderbird folders' appearance loses track of the underlying structure: messages actually present are not shown, or deleted emails still present.