[Dovecot] Duplicate Mails downloding issue

[Charles Marcus]

On 2013-07-26 8:28 AM, Kavish Karkera <kavish.karkera at yahoo.com> wrote:
> We have 3 POP/IMAP Servers, running as load balancers through DNS round robin.
>
>
> Dovecot version server 1 = 2.1.12
> Dovecot version server 2 = 2.1.15
> Dovecot version server 3 = 2.1.13
>
> Mails and Indexes are stored over NFS  and we do have these setting enabled
>
>
> mail_nfs_storage = yes
> # Mail index files also exist in NFS. Setting this to yes requires
> # mmap_disable=yes and fsync_disable=no.
> mail_nfs_index = yes

There';s your problem.

You need to implement the Dovecot Director, which was created 
specifically to address this kind of issue...

http://wiki2.dovecot.org/Director

-- 

Best regards,

Charles