[Dovecot] Outlook 2010 very slow when using IMAP - are there any tweaks?

[Kaya Saman]

On Mon, Jul 2, 2012 at 4:06 PM, Giles Coochey <giles at coochey.net> wrote:
> On 02/07/2012 16:02, Giles Coochey wrote:
>>
>> On 02/07/2012 15:51, Kaya Saman wrote:
>>>
>>>
>>> Hi Nicola,
>>>
>>> there is no specific difference apart from seeing many of these errors:
>>>
>>> Jun 26 15:10:11 imap(<user>): Error: Index
>>> /mail/AD_Mail//<user>/Maildir/.Archive/dovecot.index: Lost log for
>>> seq=2 offset=77008
>>> Jun 26 15:10:11 imap(<user>): Warning: fscking index file
>>> /mail/AD_Mail//<user>/Maildir/.Archive/dovecot.index
>>> Jun 26 15:10:11 imap(<user>): Error: Fixed index file
>>> /mail/AD_Mail//<user>/Maildir/.Archive/dovecot.index: log_file_seq 2
>>> -> 3
>>> Jun 26 15:10:26 auth: Error: Got NTLMSSP neg_flags=0xa2088207
>>> Jun 26 15:10:26 auth: Error: Got user=[<user>] domain=[]
>>> workstation=[WKS-41] len1=24 len2=278
>>> Jun 26 15:10:26 auth: Error: Login for user []\[<user>]@[WKS-41]
>>> failed due to [Reading winbind reply failed!]
>>> Jun 26 15:10:32 auth: Error: Got NTLMSSP neg_flags=0xa2088207
>>>
>>>
>>>
>> From the Dovecot wiki about ntlm_auth:
>>
>> Dovecot currently does blocking lookups, so if ntlm_auth is slow on
>> responding (e.g. network problems), Dovecot blocks all other authentication
>> requests until it's finished.
>>
>> Just wondering if Outlook parallelises it's sessions and ntlm_auth is
>> blocking because of the timing between the requests.
>>
>> Have you tried a test user with local authentication?
>>
> Or perhaps try
>
> auth_cache_size = 1024
>
> To cache authentications.
>
>
> --
> Regards,
>
> Giles Coochey, CCNA, CCNAS
> NetSecSpec Ltd
> +44 (0) 7983 877438
> http://www.coochey.net
> http://www.netsecspec.co.uk
> giles at coochey.net
>
>

Thanks Giles :-)

I think that has made things a bit better......

In terms of the cache, is that measured in seconds??


Regards,

Kaya