[Dovecot] Getting two mails.....

[Nikolay Shopik]

On 21.11.2007 23:16, Mark Adams wrote:
> Switch to Exim4 for your MTA. It won't Append 2 files to the same 
> directory if it can see they both route to you.
>
> Mark.
>
>
> On 21 Nov 2007, at 08:50, Bjørn T Johansen <btj at havleik.no> wrote:
>
>> On Wed, 21 Nov 2007 09:05:14 +0100 (CET)
>> Steffen Kaiser <skdovecot at smail.inf.fh-bonn-rhein-sieg.de> wrote:
>>
>>> -----BEGIN PGP SIGNED MESSAGE-----
>>> Hash: SHA1
>>>
>>> On Tue, 20 Nov 2007, Bjørn T Johansen wrote:
>>>
>>>> When I receive a mail that is addressed to my email address and 
>>>> also with a cc to a mailinglist I subscribe to, I
>>>> get two mails, which I guess is expected... But I have just moved 
>>>> to Dovecot from Cyrus, and Cyrus seems to know
>>>> that this is the same mail, so only one of those two mail is stored 
>>>> on the imap srv...
>>>
>>> I guess you mean:
>>> http://cyrusimap.web.cmu.edu/twiki/bin/view/Cyrus/DuplicateDeliveryExplained 
>>>
>>
>> Yes, this is what I mean.....  :)
>>
>>> ?
>>>
>>> As far as I know there is no such thing in Dovecot's deliver. However,
>>> deliver is easy to understand and probably you find someone to jump 
>>> in and
>>> make a patch.
>>>
>>> If you do not use Dovecot deliver, check your local MDA.
>>
>> Yes, I use Dovecot deliver....
>>
>>>
>>> If you mean that Cyrus stores two identical mails only once physically,
>>> e.g. when spooling for two users, then no, because Dovecot is not 
>>> designed
>>> to only support virtual users, but with real users two users cannot 
>>> easily
>>> share the same file.
>>
>> Nope, this is not what I mean....
>>
>>
>> BTJ

How does exim4 detect this? Usually second mail little bit later. So 
there only one thing you can compare is message-ID.