[Dovecot] Thunderbird caching problem

[Nick Rosier]

Chris Cappuccio wrote:
> Dave McGuire [mcguire at neurotica.com] wrote:
>> On 08/31/2011 02:59 PM, Chris Cappuccio wrote:
>>> Using a fairly simple dovecot config (which obviously needs some max
>>> limit tweaking) we have problems with IMAP synchronization between
>>> thunderbird clients.
>>>
>>> Two TB clients in the same IMAP mailbox will, from time to time, show
>>> different views of the same INBOX folders, when TB caching is
>>> enabled.  The only fix is to right-click on the folder, go to
>>> "Properties" and use the "Repair Folder" option which repairs the
>>> local TB .msf cache file.
>>>
>>> Is there any server-side fix/workaround that would keep TB from
>>> regularly going out-of-sync ? This happens with TB3 and newer
>>> versions, in concert with either dovecot 1 or 2.
>>    I ran into exactly this problem as well, it is infuriating.  A
>> workaround was discussed here awhile back.  Sticking this in the
>> "protocol imap" block of dovecot.conf solved the problem completely:
>>
>> imap_capability = IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID
>> ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
>> MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDP
>> LUS LIST-EXTENDED I18NLEVEL=1 ESEARCH ESORT SEARCHRES WITHIN
>> CONTEXT=SEARCH LIST-STATUS
>>
>
> Interesting..How do I know that I really should be announcing all of these capabilities given my current dovecot version and config?
>
> With the config I posted, here's what I send out now
>
> * OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE STARTTLS AUTH=PLAIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5] Blahfart
>
This is before login, you need to verify after login. Dovecot changes 
the capabilities it advertises after login. Remove CONDSTORE and 
QRESYNC; the CONDSTORE is the one messing it up for you. QRESYNC also 
implies CONDSTORE so you need to disable this one as well.

N.