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

[Giles Coochey]

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


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