> > On 07/29/2010 12:16 PM, Neal Morgan wrote:
> > Greetings:
> >
> > I have been having an issue with mbox corruption with two users: one
who
> > uses both a Mac and an iPhone and another using both Mac and iPod.
> >
> > In both cases, the head of the mbox becomes corrupted such that:
> > 1) the normal "folder internal data" message is no longer there
> > 2) the first message in the mbox is missing the "FROM" line and the
> > first few lines of the message header contain garbled characters.
> >
> > Once in this state, imap returns errors when the user attempts to
read
> > the mailbox.   I have been manually deleting everything from the top
of
> > the mbox to the beginning of the next complete message - to fix the
> > corruption.  Interestingly, while this fixes the immediate problem,
I
> > note the folder internal data message never gets put back at the
top.  I
> > suspect maybe this is because the user isn't using folders??
> >
> > I saw a similar thread in the archive a few years back - but didn't
see
> > a post indicating the resolution.
> >
> > I am running Debian Lenny.  The UW package version reported in
Debian
> > notation is 7:2007b~dfs.
> >


> On Thursday, July 29, 2010 9:49 AM Chris Ross wrote
> 
>    You don't mention what mailbox format you're using on the server.
If 
> you are using the traditional mbox format, this is known to not work. 
> The traditional mbox file format doesn't support multiple simultaneous

> accesses.  If you are using the mbx mailbox format, which does, then I

> would not expect you to see this problem.
>
>    If you are using mbx, or another format that is known to support 
> simultaneous access, then I'm afraid I have no suggestion to offer.
>
>                              - Chris


Thanks for the response Chris.

I am using "whatever Debian came with!"  :-)  I believe it is mbox: the
files are /var/mail/[username]

I am a little surprised to hear multiple connections to the same mailbox
is unsupported.  I have had plenty of this over the years (most in the
form of Outlook or Mac Mail on a desktop and blackberry or other phone
at the same time) and it has been working fine.  The only issue we've
run into is users employing POP on their desktop at the same time as
IMAP on their phone.  That causes the same kind of corruption.  We have
discouraged this and suggested they switch to using IMAP in both places.

This issue with the iPhones appeared here in the last 6 months when we
upgraded this box - moving away from a custom UW-imap build in favor of
the package maintainers version.  I suppose I could go back to building
it myself - it was just a hassle to figure out how to get c-client to
install correctly.


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