Messages on server revert to 'unread' after sync

Nicolas Sebrecht nicolas.s-dev at
Sat Oct 31 18:31:52 GMT 2020

On Sat, Oct 31, 2020 at 07:18:43AM -0700, Dan Barber wrote:
> Hi,
> I'm using offlineimap to pull down an account just for backup purposes. I'm
> not using a mail reader on the resulting Maildir directory.

This should not happen.

> I use thunderbird to access the imap server. After running offlineimap to
> pull down emails, numerous messages are marked as 'unread'. Using
> thunderbird, I will mark them again as 'read' but they revert to 'unread'
> again after the next run. I run offlineimap once a day.
> I'm sure this is probably expected and understood behavior. I'm just looking
> for a 'read-only' copy of my email from IMAP server to a local directory. If
> anyone can help, it would be appreciated.

I think you're looking for the readonly feature:

Nicolas Sebrecht

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