[Kde-pim] Mail loss when moving email while it is downloaded

[Andras Mantia]

Sven Burmeister wrote:

> Hey everybody!
> 
> This is reproducible with akonadi 1.7.0 and kdepim 4.8.
> 
> 1. Use an imap account with a local trash folder and a slow internet
> connection (or make the attachment bigger).
> 2. Send yourself an email with a large attachment, i.e. large enough that
> it takes a minute to download.
> 3. click on the email in your imap inbox (preview pane switches to
> "downloading") and press DEL immediately, i.e. delete it while it is
> downloaded
> 4. click on a few other emails and delete (move to trash) them  as well.
> They will not be moved instantly but kmail "waits" for the first one to
> finish downloading.
> 
> Bug 1 (annoying): The preview pane stays at "downloading" although the
> user has already clicked away from the message that was started to
> download, i.e. kmail should show the other emails while downloading the
> first one in background.
> 
> Bug  2 (mail loss): Wait until kmail finished moving all emails, i.e. they
> are not shown greyed-out in the message list but gone from it. Switch to
> the local trash and click on the email with the large attachment. Here
> only the headers are shown and the email's content is gone, i.e. no
> attachment.
> 
> If you know why this is happening please let me know the details. I'd like
> to understand more about the cache/download/move logic used since I think
> there is another issue that causes mail loss if data is moved due to it
> not being downloaded before moved, e.g. emails in an imap folder that get
> moved after x weeks by the "expire settings for this folder".

What you found is interesting. I can imagine that when you delete/move to 
trash, the item is moved in the akonadi database, but as the payload (the 
content) is not yet available (it is still downloading), the payload is not 
transfered. Might explain mail loss on slow connections and using filters as 
well.

This needs some serious testing and if this is what happens, I'd consider a 
major bug.

Andras
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