[Dovecot] Duplicate Elimination

Aravind Divakaran aravind.divakaran at yukthi.com
Thu Feb 25 18:41:13 EET 2010

> On 24.2.2010, at 16.15, Steffen Kaiser wrote:
>>> group1: user1 at example.com,user2 at example.com
>>> group2: user1 at example.com,user3 at example.com
>>> If i am sending a mail to group1 and group2. It is going two times a
>>> single mail to the user1 mailbox. But in dovecot it is not eliminating
>>> since it has the same message-id. Previously i was able to accomplish
>>> this
>>> task with cyrus duplicate elimination.
>> "two times a single mail to the user1 mailbox"
>> actually I do expect that the MTA detects the duplication of the two
>> aliases and does NOT send the mail two times to user1.
> Yeah, I think that's what I answered before too. Dovecot currently has no
> duplicate elimination code.
>  (I hate the whole concept of dropping incoming messages as duplicates
> based on Message-ID. I would definitely want it disabled for my own
> mails, for example that would mean I couldn't filter messages to mailing
> lists based on List-ID: header, because the first mail usually comes
> directly from the other user, and then the second mail with the List-ID:
> would get dropped.)

Thanks for your valuable information. Actually its not a mailing list, its
just an aliases created in my mail server. I had made changes in my mta to
handle duplicate mails.

Aravind M D

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