Problem with Dovecot and BlackBerry

[Michael Slusarz]

> On April 4, 2017 at 5:07 AM Luca Bertoncello <lucabert at lucabert.de> wrote:
> 
> Hi all,
> 
> i've got a strange behaviour with a BlackBerry Classic Phone (BBOS
> 10.3.2.2876) in combination with Dovecot 2.2.13 while trying to fetch
> mails.
> 
> Before burying myself into debugging sessions, i try to get an
> understanding if the following is a Client- or a Server-specific error
> in the behaviour:
> 
> CIGA8 UID FETCH 10009:10035 (UID FLAGS) (CHANGEDSINCE NOMODSEQ)
> CIGA8 BAD Error in IMAP command UID FETCH: Invalid CHANGEDSINCE modseq.

That's a broken client.

https://tools.ietf.org/html/rfc7162#section-3.1.4.1

"CHANGEDSINCE <mod-sequence>:  The CHANGEDSINCE FETCH modifier allows
   the client to further subset the list of messages described by the
   sequence set.  The information described by message data items is
   only returned for messages that have a mod-sequence bigger than
   <mod-sequence>."

michael