dovecot - May 2007 - Switching from mailbox to maildir.. duplicates!

Hi

We have been running a dovecot server for some time.. users connect with
pop.

Now this server is going to be substituted with a new one.. before we
used mbox, but now we will move to maildir!

I have done some testing transfering the mail with the mb2md script, the
conversion works correctly, but users gets duplicates since they
selected "keep mail on server"

I have googled for the problem, and set
pop3_reuse_xuidl=yes
and
pop3_uidl_format = %08Xu%08Xv is the same on both servers.. but no luck.

My first tought was to script in an X-UIDL header for each mail that
was  converted.. but that wont work since the mail already downloaded by
the client didnt contain that header..

is there anyone that has some experience with this, or knows if its
possible?

Many Greetings,

Lars Johansen

I'm having the same issue, but only with client using outlook (not
outlook express)

On 5/2/07, Lars Johansen <lars at larsjohansen.org>
wrote:
> Hi
>
> We have been running a dovecot server for some time.. users connect with
> pop.
>
> Now this server is going to be substituted with a new one.. before we
> used mbox, but now we will move to maildir!
>
> I have done some testing transfering the mail with the mb2md script, the
> conversion works correctly, but users gets duplicates since they
> selected "keep mail on server"
>
> I have googled for the problem, and set
> pop3_reuse_xuidl=yes
> and
> pop3_uidl_format = %08Xu%08Xv is the same on both servers.. but no luck.
>
> My first tought was to script in an X-UIDL header for each mail that
> was  converted.. but that wont work since the mail already downloaded by
> the client didnt contain that header..
>
> is there anyone that has some experience with this, or knows if its
> possible?
>
> Many Greetings,
>
> Lars Johansen
>
>

On Wed, 2007-05-02 at 11:32 +0200, Lars Johansen wrote:
> I have done some testing transfering the mail with the mb2md script, the
> conversion works correctly, but users gets duplicates since they
> selected "keep mail on server"
> 
> I have googled for the problem, and set
> pop3_reuse_xuidl=yes
> and
> pop3_uidl_format = %08Xu%08Xv is the same on both servers.. but no luck.
> 
> My first tought was to script in an X-UIDL header for each mail that
> was  converted.. but that wont work since the mail already downloaded by
> the client didnt contain that header..
It doesn't matter if the client hasn't seen the X-UIDL header, because
it's Dovecot that uses it.

The problem is anyway that your mbox -> maildir conversion didn't
preserve the UIDVALIDITY and UIDs. I'm not aware of any existing
conversion script that can preserve them.

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