Mailboxes messed up after migration

Joseph Brennan brennan at
Mon Feb 5 09:56:15 EST 2018

IMAP provides two kinds of timestamp: the time the message was placed into
the mailbox, and the time in the Date header line. In a typical inbox and
sent mailbox the two are the same order. In other folders it might not be
the same. I think Roundcube uses the first kind of timestamp, which for
cyrus is not a sort at all since it is the internal order of messages in a

I guess the question is whether the migration moved messages out of order,
or whether the users are noticing something that was true before migration.

Joe Brennan
Columbia University

On Mon, Feb 5, 2018 at 9:26 AM, Hiago Prata <hcprata at> wrote:

> Hi!
> After the migration of all users I was supposed to migrate to a new
> server, some of them reported that in some of their mailboxes
> subdirectories the display order of the messages is all messed up, with
> messages received or sent months ago being shown before them most recent
> ones. I thought it might be date format or something related, but all dates
> of creation and access of all mailboxes look the same.
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