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List:       kmail-devel
Subject:    Re: subject:no subject , Sender: UNKNOWN
From:       Ingo =?iso-8859-1?q?Kl=F6cker?= <kloecker () kde ! org>
Date:       2002-07-15 23:55:49
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On Tuesday 16 July 2002 01:02, richard.parry@rage.net.nz wrote:
> > very often when I delete an email, the following email appears in
> > the email list: Subject="no subject", Sender="Unknown",
> > Date="01.01.1970 01:59:59".
>
> Interesting!  I get this with IMAP folders, and local Maildir folders
> too.
>
> Recently I set up kmail to point to the local Maildir folder for
> Inbox, and IMAP for the rest of the folders.  Checking in to the
> Inbox (Maildir), there were a fair few messages of this type (Unknown
> in all fields).
>
> If only IMAP is used, it leaves these rogue messages there, but they
> can be deleted, without harm.  I suspect that something's been munged
> between what KMail thinks is in the folder, and what the imapd
> (Exchange) thinks is there. Normally this happens when something's
> been deleted already, and the folder is rescanned.

This bug has been fixed recently.

> What's somewhat more alarming is when dealing with local folders.  On
> startup with Maildir delivery to a local directory (~/Maildir), Kmail
> would see nothing but "Unknowns" in there.  On exit, nothing else
> could access those folders - Kmail appeared to have nuked the
> messages, thus killing all inbound email for the day.  As
> Courier-IMAP uses Maildir as well, they both need to share the same
> store, and play well with each other; KMail seems to fail where
> Outlook Express and Evolution just work fine.

To clear some misconceptions:
1.) If you configure a Maildir mailbox as account (which you seem to 
have done) then KMail will fetch all messages from this mailbox and 
store them in it's own local inbox (which is ~/Mail/inbox). Therefore 
it's not surprising that all messages disappeared from ~/Maildir/cur.

2.) Because of design limitations KMail currently doesn't play well with 
other programs which change KMail's mail folders. The problem is that 
often KMail's index files and the mail folders will get out of sync and 
this can lead to mail folder corruption and those Unknown messages.

3.) I don't see why KMail and Courier-IMAP need to share the same store. 
Why don't you access your mail with KMail via IMAP if you anyway have 
an IMAP server running?

> So, rule of thumb is obviously, no local folders because we cannot
> trust it to handle these correctly.  But it would be nice if it had
> some mechanism to self-check its results; corrupting the message
> store is unhelpful.

The rule of thumb is: Don't run any programs which modify KMail's mail 
folders, i.e. which mess with the contents of ~/Mail.

As long as only KMail accesses the files in ~/Mail it works without any 
problems.

Regards,
Ingo

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