dovecot - Sep 2015 - BINARY capability not working correctly?

Hello,

I have trouble with some attachments not working on Horde and
Roundcube. I made a ticket to Roundcube webmail and they tracked down
it to Dovecot not responding correctly to BINARY FETCH:

http://trac.roundcube.net/ticket/1490532

What is causing Dovecot to answer NIL? Is there an issue in Dovecot?

If I want to disable to BINARY capability in Dovecot I need to use
imap_capabilities. I found out that I could add capabilities with
syntax
imap_capabilities= +FOO
but it seems I can't use similar syntax (imap_capabilities= -FOO) to
remove capabilities? If I list all capabilities like:

imap_capabilities= IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID
ENABLE IDLE AUTH=PLAIN SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT
CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC
ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE
MOVE QUOTA

I understood that this will result in listing all capabilities already
pre-login. Is this a problem?

Thanks,
Jouko Nikula

Op 9/13/2015 om 12:19 PM schreef Jouko Nikula:
> Hello,
>
> I have trouble with some attachments not working on Horde and
> Roundcube. I made a ticket to Roundcube webmail and they tracked down
> it to Dovecot not responding correctly to BINARY FETCH:
>
> http://trac.roundcube.net/ticket/1490532
>
> What is causing Dovecot to answer NIL? Is there an issue in Dovecot?
A few questions to facilitate debugging:

- Do your logs show anything that may be related to this issue?
- What is the output of `dovecot -n` ?
> If I want to disable to BINARY capability in Dovecot I need to use
> imap_capabilities. I found out that I could add capabilities with
> syntax
> imap_capabilities= +FOO
> but it seems I can't use similar syntax (imap_capabilities= -FOO) to
> remove capabilities? If I list all capabilities like:
>
> imap_capabilities= IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID
> ENABLE IDLE AUTH=PLAIN SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
> THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT
> CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC
> ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS SPECIAL-USE
> MOVE QUOTA
>
> I understood that this will result in listing all capabilities already
> pre-login. Is this a problem?
Not that I know of.

Regards,

Stephan.

On 9/13/2015 6:04 AM, Stephan Bosch wrote:
> Op 9/13/2015 om 12:19 PM schreef Jouko Nikula:
>> Hello,
>>
>> I have trouble with some attachments not working on Horde and
>> Roundcube. I made a ticket to Roundcube webmail and they tracked down
>> it to Dovecot not responding correctly to BINARY FETCH:
>>
>> http://trac.roundcube.net/ticket/1490532
>>
>> What is causing Dovecot to answer NIL? Is there an issue in Dovecot?
>
> A few questions to facilitate debugging:
>
> - Do your logs show anything that may be related to this issue?
> - What is the output of `dovecot -n` ?
Probably this: http://markmail.org/message/abjg72sw7ii5ty5x

Trivial to workaround in client code, so no need to disable BINARY 
outright on a client.

michael